Help! Really sick don't know what to do :(

I'm 17 weeks pregnant and have had a cold now for 2 weeks. I've tried all the OTC medicines that pregnant women are allowed to take but it doesnt seem to work. I have the worst cough that wont subside especially at bight. i havent gotten a good nights sleep in 4 days. This morning i woke up with pink eye and to top it all off im having issues with my sciatic nerve.... do i talk to my ob or just go to a family dr?? what do i do :,,(