Diva cup leaks!!

I've been using my diva cup for 2 years and now its leaking really bad. It was starting to leak, so I grabbed a pad. I was at a friend's house, so it was a big pad not a liner. I woke up in the morning, I had so many blood clots in my cup and the pad was filled!!! Completely bloody and ended up destroying my underwear and shorts. I was in shock I even got my period I had two positive tests on two different days. The month before this period. I had the same thing happen, but I ended up emptying my cup three times and it was full each time in one day. I didn't get any positive tests that month though. Any advice? I need help for my next period!❤(also I am going to the doctor soon to get everything in check)