is this a panic attack or anxiety attack?

so around this time last year i started experiencing extreme amounts of anxiousness and nausea when going to school (i was 16 then.) i had to leave classes because i was convinced i was gonna vomit for some reason. eventually it turned into me assosicating certain classrooms with nausea and fear and eventually associating going to the building with nausea and fear. i dont know exactly what i was afraid of. but certain classrooms i would step inside and all of a sudden i couldnt breathe and i had to focus on keeping myself from freaking out. i had no idea what was going on and i couldnt eat in the mornings bc it would make me nauseous too. i had a band christmas concert and while i was on stage my throat closed up and my heart was pounding so hard that it felt like it was pounding my whole body and i couldnt play my instrument because if i breathed too hard i felt like i was gonna vomit. i remember being so terrified for my life it felt like i was genuinely about to die. i had to leave the stage and very soon after i started cyber school (which ended up being much better for me!)

but basically ive only experienced a moment like that a few times (i think 3 times in total) where it was absolute fear and i didnt know what was happening and im wondering if anyone else has experienced this? im so scared of it ever happening a 4th time and i actively avoid places just so i wont ever risk it again.