INFP:Fi, Ne, Si, Te
INTP: Ti, Ne, Si, Fe
INFJ: Ni, Fe, Ti, Se
INTJ: Ni, Te, Fi, Se
^ for reference
So, your introvert is strong- so no problem there.
Your iNtuition is strong, which implies (to me) that it is probably your primary cognitive function. It makes sense for you to go back and forth...