I tested 5 days prior to my missed period because it was our first time trying so naturally I was excited and anxious. I tested several times and got BFP each time. 7 days after my missed period I started to bleed and was notified by my doctor I had a chemical pregnancy. I want to share this with you all because if you can help it, my advice to you is to NOT test early and even wait a week or longer after missed period. my husband and I got our hopes up so high just to be let down. if I wouldn't have tested I would have just thought my period was late and would have saved myself a lot of let down.