Spotting around CD24 last 3 months in a row.

Elizabeth

This is my 3rd month trying to get pregnant and the last 3 months in a row I have started spotting around CD 24. I spot for 4 or 5 days and then get my period. It never happened to me before...so why now that I'm trying to get pregnant??!! It's so frustrating. I'm 32 and have always had a pretty normal cycle so why is it the moment I start trying this happens to me EVERY MONTH? If anyone has info pmease let me know. I feel like my body is rejecting fertilized eggs or something