Period for 3 weeks, please help?

I stopped taking birth control a year ago and I had only taken it for 2 years. I know that it can take time for your body to get back to normal but this seems to be longer than what everyone says. For the first half of that time I had no periods at all and for the past few months they are ever so slowly coming back. They are all really light and irregular. I am currently on my period and it has been going on for 3 weeks! I keep thinking it is about to be over when it just keeps going on and on. There is no indication that it is going to stop and it is really getting in the way of my life. I tried to make an appointment with planned parenthood but since I am over 18 I will have to pay for everything and I can't do that right now. So please, could someone give me advice or tell me if there is something else I can do? Please and thank you.

On a side note, ever since I stopped taking birth control I constantly break out and once the pimple is gone it leaves behind a nice acne scar. I never had acne problems before so any advice on that would be helpful too.