It sounds like you have a great plan in place. I also wanted to mention that there are alternatives to anti-depressants for moderate depression. Exercise, for example, actually outperforms anti-depressants much of the time and it's super important during pregnancy. Light therapy and fish oil supplements have also been shown to have a significant impact on mood. Perhaps working with your new therapist on some healthy habits like exercise will help you feel more optimistic. And if after birth you find you need more help, I know quite a few people who have been on anti-depressants while nursing. If you need the help, take it. Postpartum depression is nothing to mess around with. But since you said you're doing ok for right now, I would suggest talking with your therapist about these other options to see if something helps you feel a little more excited about the coming baby.
I struggled with depression in my first trimester with my daughter and it was really lonely. I didn't understand why I couldn't get excited about something we had planned and tried for. It lifted in the second tri, but that first tri was a scary time. Good luck.
Beautiful baby girl born 8/13/2012. Little star baby lost at 10 weeks pregnant, 12/18/2013. Rainbow baby girl born 12/22/2014.