GIRLS.... PLEASE HELP ME!! Problems... down there... genuine helpers only please - I'm in a world of pain!

I have a couple of questions regarding what is normal for periods. The last couple of days my period has been REALLY heavy, so much so that i have made an appointment to see my doctor but i cant get in til 29th! Yesterday was concerned i might bleed to death (mum ured me i wouldn't) I had to go to the bathroom every 45mins to freshen up. It has been like this for the last couple of periods as well. I have also noticed way more congealed blood than usual, and the pain is soooo bad i have to make sure i don't miss a dose of nurofen plus or i feel nauseous with pain & get diorrea as a result of the pain. I find it especially embarring at work when i'm slipping into the bathroom so regularly. My PMS has been really bad, i've been having 3 bad weeks and 1 good week, it's affecting my relationship, i go to the gym 3-4 times a week but have been putting on weight and i feel all over the place emotionally, my skin has become really bad (like a teenager again at 25!). can any1 help?