So it started off last night in my back and this morning I was still getting back pains and now am…

So it started off last night in my back and this morning I was still getting back pains and now am getting tummy ache in my lower tummy I dunno what I should do or if I should worry also my legs are hurting a lot n baby is moving a lot more than usual am 31 weeks and 1 day pregnant any advice on what to do ? Also having a bad headache