Help me

I got sick from drinking vodka twice now whenever I drink anything hard I feel sick and its super hard for me to drink, however its not the actual alcohol itself thats the problem I just cant drink it straight anymore. I can drink wine and beer and seltzers but just cant take neat shots without feeling sick. Can anyone give me advice? Btw im not an alcoholic or anything Im very young and havent drank a whole lot in my liftime yet.