I took some motrin about 600mg this am for severe back pain and I also took a muscle relaxer called flexeril. I just found out last wednesday that I am 4 weeks pregnant and I know that i'm not supposed to take anything when pregnant, but my back was killing me. I think I pulled it this morning lifting something. How much damage could I do? I know many people take meds when pregnant because they are only a few weeks and dont know they're pregnant and they have healthy pregnancys and babies.