Superfetation?

I don’t know for sure if it would be superfetation or not but when I was 5 weeks and 5 days pregnant i miscarried..2 weeks later I took a pregnancy test and it can back positive. I was 4 weeks pregnant again going by my dates I fell pregnant the same day I lost the other baby, the 22nd of May... which is crazy cause my SO and I only had sex 4 days before that...so would it be superfetation or not? I can’t seem to wrap my brain around it, I’m now 24+2 with the the second baby and everything is going beautifully :)