Braxton hicks or labour? Really need advice

Katie • First time mummy to a handsome little boy👶🏼28/12/17👶🏼

Really need advice. I'm 33 weeks and 1 day. I've been having these tightening pains on the sides of my stomach that keep coming and going every like 10-20 minutes maybe a bit longer sometimes and only staying like 5-10 seconds maybe, and they eccur more when Ive been up and walking around, pressure pain across the middle - bottom of of my stomach that's not moved and feels worse when I move..with sharp pains sometimes, lower back pain too but pain wise with everything is like mild- moderate and have to breathe throughout them. What is this? Or what does it sound like? I'm not sure what it is, I'm thinking its probably Braxton hicks or something but my bf said I should ring the hospital and ask about it as he thinks it could be labour🤔or something