Freaking out please comment

So 17 days ago, was the last day of my period. It was a weird period. Normal length, but it was mainly brown/dark red the entire time. I ovulated, and I'm sure I ovulated, 3 days ago. Out of no where today, I just started bleeding. I think it's a lot but I'm not sure. There wasn't any blood this morning and out of no where I felt really wet. I looked and I had already soaked through my underwear and onto my clothes. My cycles are almost 40 days, so I know something isn't right. I'm not sure what to do. Any advice is needed. Please help!!