I play the violin and the guitar.

By playing the violin, your fingertips will be hardened but not a lot. Just like about 10% hardened compare with guitarist fingertip.

I was practicing string bending till my inner nail bleed. Had to stop a few days to heal but after that it was easier lol.

The fact is your left arm and finger has not much strength and muscle. We all have the same experience when learning guitar for the first time. Keep on playing like for few weeks and the pain will go away, moreover your left arm and fingers will have more power than before.

Pressing it too hard will make the pitch higher a semi-demi-tone. (for those who knows music theory)

My band is on Final Riot! Tour and doing pre-composing for the next record. If you want my band to come, demand it! at the URL below:
http://eventful.com/demands/D0-001-000338649-6
You are overdoing and nobody can be good on the first/early days. Moreover, please do not scare people away from playing guitar interest.
Guitar and violin is both stringed instruments. These instruments are to be played with left hand fingers for pitch and right hand fingers for plucking (guitar) or bowing (violin). Guitar is a solo instrument (solo as in no accompaniment) while violin is just a melody based instruments which no chords can be done on violin (except for some very technical parts on playing).

F is the hardest chord on the guitar, it is better not to play this chord for early learners. Try to practice full bar technique (one finger pressing 2 strings follow by 3 and then 4 and so on) for some time and then only you try out the F chord.

Are you learning from a teacher?