Symptoms - 31 weeks

Gibbeanski
Not too worried about these because I think I know what it is, but wanted to ask anyway! I am currently 31 weeks with my first.
1) Occasionally, my tummy tightens in certain spots and it feels hard. Like if you were to flex your ab muscle. After a while it goes back to being 'soft'. Are these BH contractions?!
2) TMI, but (usually when I wake up), my groan area feels almost...sore. Like a pressure sore. Not really bad, just odd. Anyone else have this/dealt with this?
3) Lower abdominal pain - this is nothing new as I've had it on and off throughout pregnancy, but just checking to see if it's still "normal" to get it occasionally at this point in pregnancy.