A.,
I have gone through this situation many times in the solid 16 years I have been with my husband. (13 married). Although it really feels horrible to be "rejected" , especially since your hormones are in overdrive and you are very interested in sex and are also very sensitive at this time...my suggestion is to just relax.
It really sounds like he loves you, so that isn't the issue. You said that you were pregnant before getting married...and you did an abstanance thing for three months before getting married. He probably was interested during that time before you were showing and were "very pregnant".
My husband, along with lots of other men, have issues with having sex with their pregnant partners. As you get farther along, you only have three more months to go...you must look very pregnant at this time. My husband completely assosiated me as a pregnant mother at this point and didn't want to "hurt" the baby (no matter how much the dr.s would say it wouldn't hurt them) Mentally they weren't attracted to the pregnant motherly type. This also rolled into the time I was breastfeeding and the baby was always on me. (but don't NOT breastfeed because of that one reason - it isn't worth it just to have sex) My husband used to say that the baby owned my boobies, not him, so he wouldn't touch at all especially if milk came out during sex.
The erection you saw, is very common for men in the morning or out of the shower. It doesn't mean they are full on ready for sex...it just happens sometimes. You should be happy he had an erection after the shower. It just means he wasn't taking care of himself either instead of with you.
Also stress plays a huge part in relationships too. There have definetly been "waves" of sexual libido in my married life as well. Although I am ALWAYS READY, my spouse is not always...and it definetly is mostly directly related to things that are going on in their lives at the moment. You may feel that you are doing all the work...looking into condos, pregnancy, housework, etc. ...and he just goes to work like he did when he was single....but you have to realize that a pregnancy also effects the husband, and he starts to realize the realness of bringing a baby into the world that he will have to support and take care of his whole life. Woman usually go with the flow and respond to a pregnancy without many concerns. The man usually starts to freak out about all the responsibility that is coming up. It is just different, but a valid reason.
I've been pregnant three times...and every time has been the same as I got further along. It really sucked cause the hormones made me want more sex that I usually would...so that was REALLY bad. You sound like you are in a very similar situation as I have been.
I have come to accept this from my husband, because I know he loves me with all his heart, but I can't change the way he feels. Sometimes the pressure you are putting on him, and the crying and the complaining could also turn him off even more and make it harder to be around you.
Your life is just beginning with your husband and your soon to be new addition. There are going to be MANY changes coming up in your life and as the years go on. You can't expect your life to be like a movie and your spouse always being ready and loving and doing the right thing...because more times than none...it is NOT like a movie.
You have to try to deal with his quirks...even if it doesn't make you happy all the time. It's not like he is cheating or anything....he just probably genuinly is not as attracted to the "motherly" figure and just the idea that you have a child inside of you.
It is only going to get harder and will be a struggle once you have a child in the house. You need to come up with some survival skills of your own for down the road, and cut him some slack for right now. Harping on him all the time will honestly make it worse. You have to find medium ground that you can work with. It's not all about you...you have to take his feelings into consideration even if you feel they are unfounded.
You will have a better relationship down the road if you do. AND, since you obviously have a much higher appetite for sex, NOTHING is wrong with taking care of yourself from time to time. Don't stress out about it.....you might find that if you do, it will take the stress out of the whole situation.
:) Hang in there. I have been through the exact same thing..and it isn't fun!