Is this normal

Ok so Friday I found out I was pregnant. I was only one day late and took two home pregnancies. I started spotting Friday and so I started worrying. We just miscarried in May and I have previously had two other miscarriages. I also have PCOS so Saturday I went to an urgent care to have them test me. They did a urine sample and it came out negative so they did a blood test and called to tell me it was positive so I am pregnant but my HCG levels were pretty low so to call Monday morning with my obgyn and have my levels checked again. I’m still spotting. By spotting I mean it’s not enough for even a panty liner. It’s mainly just when I wipe and it’s a brownish cm. So of course I’m over stressing it! I heard if lines are getting darker it’s a good sign HCG levels are rising. So should I be worried. My HCG levels were 47. Any success stories with HCG levels this low?