There’s a debate at my school on which way the qibla is. I have taken one side of the debate, based off my best ability, but today I prayed behind somebody who takes the other side and thus was praying in a different direction then I think is correct. Is my prayer valid? The diff in qibla is alot

Ustadh AbdulAziz al-Haqqan

Why didn't you check through the internet?