Sayang, please go see your doctor or go to the hospital sekarang jugak, okay? Sakit yang macam tu, especially involving anus area dan kalau baby gerak pun terasa pressure, cannot just wait and see. A few of my mum friends pun pernah ada similar issues, some turned out to be normal pregnancy stuff, but some kena antibiotics or kena check lagi. Better safe than sorry lah, especially when it's affecting your walking and comfort like this. Jangan delay, get it checked properly so they can see what's actually happening. You deserve to feel better!