31 weeks an in pain!?

Ok so am 31 weeks with my second child. Wiv my first I was diagnosed wiv sciatica at around 30 wks, but it is stayed even after pregnancy n is worse durin this pregnancy which I have now been diagnosed as havin PGP (pelvic girdle pain) last nyt in bed I ***** turn over without havin to physically lif my left leg to ease pain, I was close to tears! Also for the last 48hrs I've been havin crampin pains in my tummy an strong, longer lastin braxton hicks an really bad dull back ache, limitin me walkin or movin. My mum has had 4 of us an her last pregnancy had pre-eclampsia which was at 31 wks an both my mum n brother nearly died! Tonight I was havin a bad pain under my ribs kinda like indigestion... Now that's how my mums preeclamsia started out an wat it was diagnosed as at first, till she started fitting an vomiting! I dnt feel ryt in my self an I'm full of aches an pains! I've read up on a few sites about my symptoms an some say pre-term labour, some say preeclampsia.... Wat do u think? Wat wud u do if u was me? (Sorry about the length but I needed to get in as much info as poss)