My arm is hurting

My left arm, near the shoulder is aching like mad.

I dont remember it hitting the ground yesterday, because ergonomically it is impossible that if my palm is on the ground, unless my shoulder is fractured, it wouldnt have come with direct contact with the ground.

But it is hurting like crazy now.

My blister had grown to an elipse size of 3cm by 2cm and I've realised there's some small bruise on my left palm and down my left leg.

I've booked for my next practical for next sat. I've until thurs to change my mind. Haha.