Thanks ladies, I wasn't expecting it could be anything big. I'm not one to go to the docs (ever really) but been pretty good since I've been pregnant. Went to the docs on the third day of a migrane a few weeks ago (having never had one before) and was a bit freaked out when he said he was checking me for a brian haemorrhage! needless to say it was put down to hormones after a check up but sometimes I think they can get you overly worried about nothing.
I should really be going to the MW next week but I'm on a training course with work that was already booked and paid for, boss wouldn't be too chuffed if I said I couldn't go (it's non-refundable and there is no other course til the new year) so went for next available app which wasn't until following week.
Had a look on the website for the royal college of obstetricians for Obstetric Cholestasis, says it doesn't usually affect women until you reach 28weeks (and I'm only 16). It's pretty rare for women from white british ethinic groups (only 1%). Might give the surgery a ring and see if they think I should go in just to be sure though.