UPDATE: Red Bull and pregnancy

What's your opinion on this? I'm currently 16 weeks pregnant with my 4th an I cant seem to kick the habit of drinking them. I don't need y'all to bash me I just need advice. If I go a day without one I get horrible migraines and just want to lay in bed all day. I haven't been able speak with my dr about it because I've only had one apt at the beginning of my pregnancy and I can't get back in to see her until I am like 20weeks.

Update: I'm keeping this anonymous because of the bashing but I have tried coffee and pop as a replacement and it don't help the migraines and it's getting to the point of 1 red Bull won't kill the migraines. So coffee and pop are out of question.