almost 35 weeks! worried!

so im 35weeks pregnant (on Thursday) &last; night my husband and i were snuggling, and i got up kinda and turned to give him a Bj, and im not sure what happened, if baby turned and is laying in a position on a nerve or something, but after i got up and turned, my left side started hurting pretty bad i had to lay down & it got a little better but i still felt it, & if i put some pressure in the area, it would hurt even more. then my husband tried to get her to move thinking she was just laying in a spot thats hitting a nerve, ⁢ felt a little better for a minute or two and then came back. and now today I'm still having this feeling & im getting worried that something happened or is wrong?? if i stand it starts hurt worse, and worse then it felt last night. if i lay or sit it generally doesnt hurt as bad, or goes a away for a little while. should i be worried?? its my first, i dont think it could be labor? it just in the one side.