Stressing during tww, ugh

I am on my first month of Clomid and we bd literally three days prior to my ovulation and the day of and after. But this morning I woke up to my fiance phone going off and seeing that he is back on FB and has been texting other people asking to take them out. Now I'm sitting here in tears hurt and trying to calm myself down because for whatever reason I still want this to be my month. This is my second serious adult relationship and apparently I'm not great at picking significant others, my first relationship ended after I finally had enough of the abuse and now apparently I'm with a serial cheater. I'm venting to y'all because I have no one else to vent to. I feel like I'm not getting pregnant because I'm not good enough to be a mom just like I'm not good enough to find the right guy for me.