Really confused and emotional..

Meg
I took a HPT on 19/03 and got a BFP but started bleeding (it was the day of expected AF too) so guessed it was AF. But then got another BFP the next day (20/03). I went to Drs. And they done a hcg and it came out at 51 the doc said he can't confirm as levels of pregnancy would be 50+ but it my levels are on the edge. Can anyone give me their experience? Is this normal? As I should be around 5 +4 days doc said. Please help 🙏 I'm so anxious