Please help

I'd be 5-6 weeks along (haven't gotten an ultrasound yet) and today I've been worrying about having an ectopic pregnancy, the last 2 hours I've had some cramping but it's more like pressure on my lower stomach. It's nothing like my period cramps, I have had normal discarge then it turns light brown then I had some bleeding only enough to last 2 wipes. My expected period was estimated to be around this time so I have heard people have bleeding during early pregnancy. I really need help. My first beta levels were 33 then 3 days later they were 147.4 then 2 days later it was 280 (it was suppose to be 290) I am super worried can someone help me