Advice please!

Ok. So for three four days now I have been flooding myself in discharge. The discharge doesn't smell at all or it's not a funny colour. There is just A LOT of it. I have to change my panties three times a day. Anyway I have been getting cramps in my lower right side of my belly and I have had the worst indigestion. I finished my period over a week and a half ago, but before my period I had brown discharge for a week. Has anyone had anything like this before? I have been tested for sti's and I'm all clear and I figured it's way to early for a pregnancy test. I'm currently sexually active and not the best at using protect(don't worry I'm in a serious relationship) Is it something in my diet?