D.C.
You definitely have your hands full...and I can sympathize. Although I didn't have my first child until I was 26, I had my first two (both boys) 27 months apart. I had similar problems with my oldest beginning when my second was around a year old. I began spending individual time with each child when I possible could. This was difficult as I was active duty Air Force at the time, and my husband was serving a one year tour in Korea as well around that time. But I knew that older children will act out more when there is a baby in the picture. I also took my son to a child therapist...it was actually more theapy for me than for him, she helped me immensely. She let me know that I wasn't a bad mom and I didn't have bad kids. I was overwhelmed and doing the best that I could. Take heart...the problems you are having do get better. But as they get better other things do arise. Find friends who have children your children's ages and arrange play dates if you can. Find a friend who will share babysitting with you. I have done this with a friend I have had for the past 10 years, if one of us has errands to run or want to take the older children someplace we will call the other. We never charge for babysitting, we just take care of each other. Even though I now have 4 children and the older two are teenagers and help with occasionally babysitting the younger two (ages 8 and 1) I still call on my friend fequently as she does me. Her two are now 11 and 4. This saves us babysitting money and gives us a break when we need it.
As far as the potty training, again I feel for you. My first son was 3 1/2 when he was finally potty trained and my second was 3 and 11 months! My older one's day care teacher gave me a recommendation that I tried. Worked like a charm for my oldest, my second it didn't phase. I told Justin that Mommy wasn't going to clean up any more of his poopy diapers. As a matter of fact, we weren't going to have any more diapers for him. They were for babies like his brother. So I got him some cool big boy underwear...spiderman! Then when he wet on himself, he had to change his own underwear and pants..and shirt if necessary. If he messed on himself he had to clean himself up. He would let me know or I would notice him going. I would put newspapers on the bathroom floor and give him the wipes. He then cleaned himself up. He cried and said "This is yucky I don't like it" I told him I don't like it either that's why I don't want to clean up his yucky messes anymore. It only took TWO times till he decided he would rather use the potty! Jonathan on the other hand I just had to give up on. When I finally stopped pushing him to use the potty, after a couple weeks he just started using it on his own. My 8 year old was a blessing...she potty trained herself before she was 2! Each child has their own schedule...and temperment. Be patient and try not to push too hard. I attributed part of Justin's problem with the fact that he had a baby brother in diapers and saw that he got extra attention because of the diaper changes. Maybe he still wanted to be a baby too, I don't know. But he didn't like having to clean himself up! Try it and let me know how it works for you. My husband would never let the boys in the bathroom with him when he had to "go", but my daughter followed me everywhere, including the bathroom. I believe that is how she learned to go quicker than my boys. That might be something you want to try as well. When you have to go, invite your daughter to go in with you (I didn't have to invite Lauren!). Often children learn by observing. I hope some ramblings of a 42 year old veteran mom have helped!