Sorry I didn't see this thread before, hope this helps - sorry for being long winded
Depression runs in my family. Before I had my MC, which uncovered a serious condition requiring surgery, I was fine. Afterwards, my mood declined and my PMS became severe - instead of the usual grumpiness, now I was screaming, crying, wanting to hurt someone else or myself and had no idea why. The rest of the month I'd just be 'blue'. I went to my doctor, who diagnosed major depression, and told me she wanted to watch my mood carefully as it might get worse. Boy, was she ever right. Within weeks I was suicidal. She got me on meds right away, but watched me VERY closely as well (she's the only doctor I know who calls her patients at home just to see how they're doing!) and nearly hospitalized me. A few times I nearly took myself to the Center for Addiction and Mental Health after contemplating jumping in front of the train rather than getting on it to go home.
Every day when I took my pill, I told myself it would work eventually, and after about 12 weeks of feeling worse, then better, then worse again, I finally started feeling 'normal' again. Now I'm actually happy quite a bit of the time - I would honestly have settled for something much less, so it's quite a gift when I find myself smiling and laughing; I never thought I'd get here.
While I was recovering, I wasn't worried about messing my my cycle or chances of conceiving, because as far as I knew my condition and the surgery had finished off any chance I ever had of getting pregnant. After many scans and specialist appointments, I was told that's not the case, and while I'll always be considered high-risk and will very likely be required to have a C-section and possibly be put on bed rest for part of my pregnancy, there's no reason we can't TTC.
Once I knew that, I started worrying. I'm already on 200g Tegretol 3x daily (I'm epileptic) which is known to cause spinal defects (I take 4mg of folic acid every day to prevent this), and now I'm on 40mg of Celexa as well. My doc assures me it's not dangerous - what she told me was when considering meds during pregnancy, doctors weigh the benefits and the risks. If the benefits outweigh the risks, it's worth taking. In my case, having a grand mal seizure is more dangerous to a fetus than the 1% chance of spinal defects from Tegretol, and likewise, any problems that Celexa might cause are far offset by the potential of self-harm or even suicide that I might face without it.
My advice is to treat the depression and not worry about anything else right now; the best thing you can do for your child or potential child is be healthy yourself. Focus on you, get better, and worry about TTC when you're ready.
You said you stopped taking the AD - was that on a doctor's advice, or on your own? If you're still depressed, I think it's important to concentrate on that first.