Hi im 31 weeks tomorrow and for the last few days I've been having a lot more tightenings which I'm assuming are braxton hicks... during 2nd trimester I got the odd one every now and then, but this last week and especially last couple of days I've been having a good few ( id say 5-7 where it feels uncomfortable like period pains) every day, sometimes it'll be a couple in a row or it'll be sporadic. Is this normal?