severe bloating... TMI

So I've had this severe bloating for the past month now... normally I wouldn't worry cause I had put it down to period but i don't normally bloat and especially not to this extent... I'm the same weight as I've been for the past year so it's not that... I'm quite worried as I'm normally quite flat on the stomach! Not to be vain or anything I'm genuinely worried about it... only got a small bit of bleeding which only last day and a half (which is really unusual for me it's normal over 7 days and extremely heavy and have been since I first ever got my period)... anybody got any ideas?