Pregnant after miscarriage!???

I had a very early miscarriage on May 3rd. When I got blood work done the doctor said there was very little HCG levels. My pregnancy test were very very faint. After the miscarriage I didn’t use protection with my husband and now I think I’m pregnant again. I took three pregnancy tests and they are all very bright. I know people say the pregnancy test can still show up positive but the doctor said there was barley any HCG when I tested and the pregnancy tests from the May miscarriage were very very faint. Any thoughts on this?