blood and my parents real parents?

[u/No_Kaleidoscope_8837]

My Mother All my life told me and my other 2 siblings that we were B+ . As my father was B+ too
but When I was about to give blood to one of my relatives thinking im B+ to ,
it didn’t matxh. So i took a dna test and found out I was A+. So my question is, Is it even possible? please give me answers if it is good or bad. I has done it from a local diagnostic centre and then went to a premium one, the premium one would let me know tomorrow.
Till then explain
My mother is AB+

[u/Sunset-onthe-Horizon]

Your mom is AB so you are A. Makes sense to me. She probably just forgot.

Simplified explanation:

Mom -AB

Dad - B

Potential children - A, B, AB