This will be long

November 2016 I went off the depo after being on it for about 2 1/2 years, I didn't have my period while I was on it.
I had my first period at the start ofJanuary, next one wasn't until end of February, then I didn't have another one until April. They were every 2 weeks for about 1 1/2 months then I started having them every 1 1/2 weeks for about 2 months then they went back to every 2 weeks until about 2 months ago where I started getting them every 3 weeks.
They are usually pretty light with every 3rd one being heavyish.
About every 2 months I would miss one.
Over time they have started to get heavier and more painful. The last 4/5 periods have been really heavy and painful. ( needing to wear a pad and tampon and change them every 1-2 hours)
Around September/ October I started having ovulation pains/ noticing them. these have also been getting worse. My groin and abdomen always feel tender. I get a lot of cramps every time I ovulate but they can last up to 4/5 days. About a month ago I stood up and collapsed/ fell over when I got a sharp stabbing pain in my right side.
I started my period yesterday but was having period cramps for about 4 days before it started. I usually get my period 12-24 hrs after the cramping starts. At lunch I started getting really bad cramps that got worse quickly. I took 1 panadol at 1pm which did nothing, by 1:30pm it was a lot worse so I took a Tramadol which did nothing. I couldn't sit/ stand upright and felt like I couldn't breathe. The pain was in my groin/lower abdomen (bellybutton down) it started going to my right hip / side so I thought it was my appendix. After 2 hours it subsided pretty quickly and I feel asleep from the painkillers. I've only had mild cramps since them. It's also been really heavy.
Does anyone know what it could of been? I'm starting to get worried.