What is going on?!

Lavon
Ok guys, so last month may 9th - May 12 I was on my period, a little lighter than usual. Then 2 weeks later BOOM I got my period again may 27 - May 31 and it was heavy! That has never happened to me before, really through me for a loop. Now here I am 3 weeks post 2nd period and I have had reflux terribly for like 3 days? And my breast and nipples hurt and are so sensitive. They are kinda hard in some places and I feel like they are dragging me down! I've also been having some pain on my left side like around my ovary... Has anybody else experienced this? Any input would be greatly appreciated!