FTM- Should I be worried?

Ally
So I went for my 35 week appointment this afternoon and everything was normal but the dr did say that he could come any day now. Tonight I've been experiencing my belly getting really really tight and I've had some pressure down low. It's not very painful, just mostly uncomfortable. Is this something I should be timing and paying attention to? Or can I sum it up to Braxton hicks and ignore it?