Hi for the question asking since I turned 22 at the end of this year if I was a full time student for at least 5 months. I was for only 4 months so I say no correct?

If you were enrolled for 4 months, then you would answer no when it asks you if you were enrolled for at least 5 months.

The actual IRS rules State some part of 5 months... So if you were enrolled from January 31st to May 1st this would qualify as a student for 5 months.