The Doctor Said WHAT???

I just had my Ob appointment today to get a pregnancy confirmation. I’ve gotten a positive digital at home. The doctor told me I was pregnant. I’m 4 weeks and 2 days supposedly. I’ve been getting positive and negative test. I told the doctor I was confused. He took a blood test to see what’s going on and he will call me with the results today. I’m so sad. I missed my period and I pray it’s not a miscarriage. He said not to worry that I may have gotten pregnant later than I thought and it’s still early. Has anyone experienced this?