Pregnant again - 4 weeks after miscarriage

Hello all, wondered if anyone has been through this? I miscarried on 21st February and bloods have now confirms im pregnant again.. My HCG levels are 190, I must of conceived straight after. Which would make me 3-4 weeks. Is 190 HCG level normal at that stage of pregnancy, I was 6 weeks and 4 days when I lost my first one last month which I was devastated and now I'm super nervous praying all goes ok. There guna scan me at 6 weeks or so make sure all is ok. My pregnancy tests are a lot darker this time which is a good sign. Has anyone been through this and also is 190 HCG low or ok at 3-4 weeks pregnant?