Spotting in second trimester

DoveJo
Hi ladies, just wondering if any of you have had regular spotting in your pregnancy and all had been ok? 
I had a red bleed at 11 weeks and 12 weeks and I was scanned both times. The only thing they could see was a small 4mm clot just at the next of my cervix. They said it wasn't concerning and would either reabsorb or come out eventually. However, since then I've had brown discharge everyday and I'm 14.5 weeks now. No cramps, no loss of symptoms and we have a Doppler so heartbeat seems fine. Guess I'm paranoid something is going to go wrong at any point. Thanks