Im afraid? Can someone answer this?

So May 6 I had my period regularly. 28 day cycle and lasts 7 days. Then on May 21 I started having a light bleed and it stops and i wake up from that day and I bleed light again. Then half the day I bleed very lightly and it stops again and when i wake up I see like a brownish dark color and it looks like old blood. It was gooey and stretchy to. And then my bleeding stopped again and I woke up this morning with tiny cramps and im bleedig lightly red again ?!! Im also on BC !(missed a few pills last month and this month also) Never had sex ! Im 14 also. HELP?