A little freaked out, someone give advice please

Friday night I went to the hospital because I found very very faint blood after I wiped and I hadn't had any bleeding up until then so I went just to be safe. They did an US and not only discovered I was 6W5D but the baby also had a good heartbeat, 129 BPM. The spotting stopped almost immediately. Then Saturday afternoon I started spotting again, wasn't a lot but still scared me, I held out and it stopped, but I've been crampy so I'm just worried, does anyone think I'm in the very beginning of a miscarriage or is the baby okay? Any advice helps!