Pressure in Bum

I’m 34 weeks and I’ve started to feel pressure in my bum. No contractions, no Braxton Hicks. I also have Varicose Veins on my vagina and those are hurting more as well. Baby has still been moving a lot. A little less today but she moves a lot some days and a little less on other days. Is the pressure in my bum normal? I’m due for my check up on Thursday with my OB.... should I go in sooner? The soonest I could get in would maybe be Tuesday unless I of course go to the ER. I’m a FTM and dont know if I’m over reacting. Nervous something is going to go wrong.