I absolutly understand and here is what I have to offer:
Make car time fun using toys or a cd he really likes. (suggestions: the wiggles, playhouse disney, my favorites are Louis the Lion, Philly Joe Giraffe plays the drums, the last two are books that come with a jazz cd. It's both fun for you and great for the kids. Jazz is calming.. except the drum one is pretty upbeat.
In the morning: He screams.. my kids whine (they are two and three) they whine for chocolate milk. It's the most annoying thing ever and although I shouldn't sometimes I yell too. Just try not to. I repremanded myself this morinng on that one because I was so tired, which makes it an issue about me and my feelings/needs not the fact that they are hungry.
So, wake up before him and give him juice or milk or something that he likes. Put cereal out for him or have his eggs ready the minute he arises. He may be hungry (my kids are.) Getting them to eat right away is tricky, but they get used to it if you take them, change them, and put them at the breakfast table.
Routine (although I never believed it before) is the key to EVERYTHING with babies. That way they know what to expect and grow patience because they know food is on its way or play time.. ect..
It sounds that you have too much stress on you. If you can cut back hours at work, or allow someone (i.e. a husband or boyfriend) to care for you both emotionally or monetarily, it sounds like you need it. Can your mom or a friend or just someone pick him up from daycare?
We all need help and there is no shame for asking for it. That is why we can't really judge that woman who years ago drowned all five of her children. Although it was wrong and sad, we have no idea what she was going through or if she had absolutely no support. We don't know if her husband was being a jerk and expected too much or if she felt she coudln't talk to anyone or if her responsibilities were too overwhelming and she couldn't/didn't have help. Stress makes you lose your mind. Being pregnant doesn't help. Everyone who doesn't have children seems to think raising kids is easy and it's quite the opposite as we've learned.
In my discussion last night with my husband, who is very impatient and irritated with our children's constant need for attention right now, I explained that the more QUALITY time I spend with them, the less they "bother me" throughout the day. Meaning instead of whining they point, ask, or show me what they need/want. But I have to pay attention or I miss what they are saying and ignore them for too long which leads to meltdowns and me getting angry. In the end it was my fault for not attending to them when I should of becuase I was too busy doing what I needed/wanted to be doing.
When I take the time instead of getting mad or straight out asking with frustration "what do you want" I, and you too, will see a huge difference. Since your son probably can't say much yet, ask him very CALMLY to point, or take his hand and say show me.. walk around the house with him.
The minute he senses tension is the second he will get frustrated and not be able to communicate with you. He knows he can't say what he wants to and overall 13 months is a difficult stage because they know the words in their head but can't get it out of their mouths.
Perhaps also when you pick him up from day care it is because he does not like his daycare or has bad experiences throughout the day.
Maybe it stresses him out. Crying is the only way for them to express stressful situations. Look into other facilities and see if changing it helps.
Look into having someone be at home with him throughout the day, I know lots of women do it for reasonable costs. I did it for a while for two airline pilots whose schedules often overlapped.
Take him to a park or for snow cones after daycare if you can so he can have a mellow "mommy and me" time as something to look forward to when you pick him up. Do nothing but pay attention to him when you do that.
Dinner can wait (if he's not too hungry).
One final thought on the car ride:
Although no one but me would reccomend this, if you can turn your passanger side airbag off and put him upfront with you, try that. Perhaps seeing your face all the way home will make him happy. Again, I'm the only one who would suggest it, but he obviously misses you and wants to be able to hold your hand or connect with you in someway after daycare.
All of these are things that worked for me. My children will be two and three next month. They are a year and five days apart. Trust me, I've been there!
Love Always,
J.