@emy730 I'd call. You're right that it's probably nothing, could be like what @christac1010 said or it could be a UTI or it could be that baby is just chilling down there and causing discomfort. Either way they may be able to give you some advice to ease the pain even if they aren't concerned about it.
@canavara Can you call L&D for those pains and see what they think instead of waiting for your doctor? My L&D says to start calling them for questions about being in labor any time after about 26 weeks.
@canavara that is horrible!! I can't imagine when you mid-late third-tri... All sorts of weird/worrysome things happen then. My widwife gave me her persnoal number, so she has always responded to texts right away and picked up the phone as soon as I call.
Is it too late? Unless you really like your OB, that would be a deal breaker for me... but that's just my personal comfort.