HELP ME SPOTTING AT 14 weeks

Okay so I just made 14 weeks today. June 27th 2021

I had some light red / pinkish / then ends in brown spotting. On and off. Doesn’t happen all day everyday. This is my third pregnancy never had this happen before. I had sex Monday June 21st with my boyfriend.. spotting started Saturday June 26th at noon around lunch time. I went to the ER. They did a ultrasound, said the baby heart beat was strong and the baby was very active. Put me on bed rest for a few days, told me follow up with my OBGYN. I’m so scared. Everything that is coming to mind is “ miscarriage “ I don’t want to think so bad, don’t want to think too good and then boom my feelings hurt. I never experienced anything like this. I do work 8-10 hours a day. On my feet at Walmart. I have been stressing a little not going to sugar coat. Just making sure everything is good and perfect. I went back to ER when the spotting started back.. the Dr did a cervix check HE SAID he didn’t see any active bleeding The spotting it’s not heavy. I DONT HAVE CRAMPS OR ANY PAINS WITH THIS SPOTTING. I haven’t wore pads because I don’t need too. ANY ADVICE ? PLEASE HELP!!! I’m so worried can’t stop crying.