6 weeks pregnant with 🌈 and having back pain!? Help!

I had a ultra sound Friday and they measured me at 5 weeks and 6 days we saw the heart beat it was 96 bpm I started getting lower back pain Sunday I am 6 weeks and 2 day today and it still comes and goes and last night I had a dream that i started bleeding !!!! Ugh this is so stressful I just had a miscarriage in June I'm trying to stay positive and not stress