Pains 35 weeks

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 :)
Has anyone els been getting bad pains around about this time? My boys head is engaged and he's making my spd so painful atm head butting my pubic bone but this evening i been getting pireod pains but 30 times worse and it's only when baby moves :( so agonizing don't know what to do