This May be a little too much information for some....

Ok so this is a little hard for me to post... But i would like to know if I'm the only one or not.

Today I had a check up with my midwife, cervix was checked and I'm 1cm dilated, I'm 2 days shy of 35 weeks. Here's the problem. Ever since I came home I was having a pressure/pinching feeling in my butt hole. It's off and on but very uncomfortable. Then I started having diarrhea a couple hours later,but it's red. First thing I thought was maybe it's some medication. I was recently put on loratab 7.5 and flexeril because of a slip and fall I had causing some back pains. My friends mother said flexeril caused her to have red poo... But last night I didn't take the flexeril (I try not to take any pain meds since it causes my baby's movement to slow down, if I have to I will take one or the other) I have had more than one BM and both times they were red and I'm still feeling pressure. I read that sometimes it was normal in late stages of pregnancy. Should I call my Dr in the morning or go to the ER?

Please tell me I'm not the only one. I'm really worried it's blood because it does mind of smell like blood.