Braxton hicks

Yasmin • I'm 21yrs old grown up with bad ibs which made me in constant pain growin up ended up with fibromyalgia 2 yrs ago and now I'm going to be a mum :)
Can i have someones veiw on this please since i was about 21 weeks i got badly painful braxton hicks and in a way i was glad because then i know what they but since i hit 29 weeks i haven't had braxton hicks much well not ones i know of because they haven't been hurting and im 31 weeks today and still haven't had any :/ should i be worried ?