Pressure

I was told I had gardnerella vaginitis. I’m 32 weeks and 4 days and I’m having pressure in my bottom area like I need to poop all the time. Yesterday at work, I went to the bathroom and my poop was in pebbles which it never is. (TMI) I can’t find anything on the internet so I’m assuming this is normal? After going to the bathroom, the pressure stayed there for a few hours then went away. Now today it’s back. I have server pain in my right hip/lower back area as well. I’m a FTM so I’m worried and don’t know how pregnancy really is. Should I be concerned or wait till my next appointment on the 16th?