Rotavirus

My daughter got her 2 month vaccines on May 18. After that, she began having severe diarrhea which lasted a week and we ended up in the hospital so she could be hydrated with IV fluids. We were discharged from the hospital last night, but her regular doctor just called saying her stool sample was positive for Rotavirus. Rotavirus is one of the vaccines she got on the 18th. Can getting the vaccine cause a baby to test positive for rotavirus (I asked the dr and they didn't know)? Also, her diarrhea has stopped and she has been eating. Should I still be super concerned?