Concern almost 31 weeks

So new momma here and have been thinking I have had Braxton hicks for a couple weeks now but very inconsistent. Today i have had stabbing pain that goes across my stomach and goes to my lady parts. Little boy is moving a little bit so not crazy concerned. We did have sex the late afternoon. No bleeding or fluid but just want to make sure I'm not taking this to lightly. I have a doctors appointment on Thursday but want to know if I need to contact them earlier.