First, God bless you for asking for advice and help, that is very tough to do!
I am a mother of two young children (3 and almost 5). I have a very good support system, but when I had my son I went through a serious bout of depression and anger. I went back and forth on whether or not to take medication, go to counseling, etc. I finally decided to go ahead and try Prozac on a very low dose, and it was amazing to see how much it helped me. I know that some people see antidepressants as a crutch or something bad, but they are really there to help people like you and me get through some tough points in our lives.
I am not sure why your mom thinks you better not, but I found that Prozac just helped me have a few moments to "think" before I reacted to a situation or my kids. Being a mom is difficult enough, and then add being single on top of it is so tough! Sometimes after having children your hormones get so out of whack that you have to relearn how to cope with stress and life.
My recommendation is to go ahead and try antidepressants, they don't make you weird or anything crazy, especially the SSRI's like Prozac, Zoloft, etc. I would also recommend getting a good support network going, people who can help you learn how to cope with life. I have found several ladies in my church that have gone through similar situations, and actually we joked and called ourselves the PE Ladies (we were all either taking Prozac or Effexor! :0))
Try to get involved with a group like MOPS (mothers of preschoolers). They have great meetings and even ones for working moms. Go to www.mops.org to find one near you. Many churches have mothering matters groups too. The point is to get with other moms who can share in the struggles we all go through. It was amazingly healing for me, and I hope would be for you.
Okay, enough going on and on :0) Bottom line, don't be afraid or ashamed to take antidepressants. You don't have to take them forever, and it is better to be a happy mommy on antidepressants than a miserable one without. Do what you think is best, not what your mom thinks is best. You know yourself better than anyone!
Hope this helps. Email me if you want any futher info on the stuff I mentioned. I would love to pray with you too!
K.