1st time taking antidepressant. Help, please!

14 weeks pregnant w/second baby. My doctor and I decided that my depression is due for medical intervention, so I started 50mg of Zoloft yesterday. All afternoon I felt nauseous, with vomiting, headache, and insomnia to follow during the night.

Now I'm not convinced that medicine was the answer, even though it was my first dose. Feeling like I can't win- I am ridden with an unimaginable amount of guilt either way. My husband and two daughters don't deserve this.

I would really appreciate any kind of encouragement from other mommas that have dealt with depression during pregnancy. Especially if you've taken medication for it.

Thank you.

Side note: I have been more active than ever the last few months- I'm running three times a week, yoga, and exercising with weights. In addition, I eat well. The decision to medicate wasn't taken lightly. It has been very difficult to complete "normal" tasks or care for my two girls and myself. I just want to feel like myself and be excited for this baby to come.