Me again.... With my never ending problems.

So about a month ago a started on the pill, diane-35. I went on it to clear my skin up. Before I started taking the pill I had missed a period and was supposed to be coming up to another one, I thought. I got impatient and wanted my skin to clear up asap and figured because I wasnt using it for contraception, that I could start taking it whenever.
So I took the pill for a whole month and finished taking it when the packet stopped as it made my skin a lot worse. So by now its been about 3 months since I have had a period.
Before I started the pill, I took a pregnancy test due to my late period, which turned out.
Yesterday, about a week after I stopped taking active pills, I had spotting. It was very light. I only had slight cramps for most of the day.

This morning I woke up in excrutiating pain and could hardly move. All of my lower stomach and back was so cramped and just very painful. I also found it painful to walk. I got up and took nurofen plus which made the pain go away completely. So I thought it was just a heavy period after missing a few. After I had a shower, I was just standing there and I felt something being pushed out of my vagina!!!!....
And then this big clump of tissue fell onto the floor. It was quite big and clumpy. It was all one big connected thing of tissue. It ranged from a dark dark red, to a white colour... To purple. I have no idea what this is!!!
Did I have a miscarriage or was this just built up membrane or something?

Please help