Weird signs?

My husband and I have been trying for almost a year with no luck yet... I have been logging on here everyday to help myself keep track of things and I am currently on my last ovulation day... the issue I'm having is I did start cramping and spotting the other day but only when I would use the restroom... I had a panty liner on just in case I was about to start for some reason and I don't have my fertile time frame down to a science yet lol... and nothing... but when I'm finished doing my business there is a clot and blood...I have no idea what this means... anyone have any advice??