Threw up after only 4 beers??

I’m an alcoholic (been drinking for a decade) and I have been drinking mostly bud-lites for the past few months. and a few liters of vodka. today i got a pack of ipa’s bc i got tired of shitty beer and i love the taste of ipa’s. after not drinking for 6 days (bc of starting a new job) i got a pack of 7.1% ipa’s today. I have only had 3.5 and just threw up quite a bit. i like the taste and im barely drunk. is this some sort of gastrointestinal issue or just something to do with IPA’s?? idk. very weird. figured i’d ask bc i haven’t thrown up from alcohol in ages. (especially such a small amount)