Bleeding while 7 weeks pregnant!

So first off I’ve seen my babies heart beat two times growing and all is good. Two days ago I had bright red bleeding when I wiped. I followed up with a hospital visit checked on baby Friday heart beat all is well. Bleeding stopped by Friday, yesterday had sex and now I have a lot of brown blood freaking out. Anyone experience this? It must be because I had sex right? Not really any bad cramps or anything. A little crampy. Mostly from acid reflux.