31 weeks. What should I do?

Hi girls, just need some advise. Last night in bed I flinched and I think I pinched something in my back. I had a really busy day yesterday. I’m 31 weeks.

I slept so bad last night because of my aching.

It kind of feels like just dull period aching. Doesn’t come in waves, it’s just a constant aching feeling.

I have my next appointment not tomorrow but the next. I’m not sure if this is something worth being checked or if I’m just having an off day! I have had a bath and taken some paracetamol but it is still there.

Note: the pain is in my lower back, mainly my right side just above my bum. I also have the aching feeling in my pelvis and lower tummy (below belly button)