Tw miscarriage and pregnant again?

Alannah

So I had miscarriage February 29th at 5 weeks.

I had sex 2 weeks after the miscarriage.

Last 2 days I felt weird like I did first time I found out and I’ve taken a test and it’s positive but it’s only just over a month since the miscarriage is it possible to even show up pregnant this soon.

I took a test a week ago to check it was negative what the nurse told me to do and it was.

Help?? Trying not to get excited