Random bleeding?

So my husband and I have started to try for our first baby. I have been trying to track things as closely as possible but I have really irregular periods. I am supposed to in my ovulation phase right now however yesterday I was having terrible cramps so bad I thought I was getting my period and then I started bleeding so I assumed my period just came earlier but today the bleeding stopped and I just have some mild cramps and nausea. Has anyone else experienced this should I be concerned