Is it normal tha tI haven't had a BH contraction yet, at 27 weeks? (start of 7th month)?

I'm 22 weeks and i've been getting BH contractions for about a month or so now. Almost all last night i was getting them and had a few today. My uterus tightens and my stomach gets hard and it feels like alot of pressure on my bladder also it hurts sometimes. Since it's your first pregnancy i'm not sure if it's normal or not but this is my third pregnancy and i remember getting them with my first.