Should I call my doctor?

So I'm 35 1/2 weeks today and while squatting to pick something up at work I felt a sharp pain in my cervix. First time I've felt it though my hips have been causing so much pain by the end of the day I can't even stand. I work at a daycare so I do a lot of squatting and bending over. Should I call my doctor about it or let it slide? I'm generally pretty cautious though I try to not bother my doctor.