I keep dying from "non-zombie" related issues..

Im a new player and well, the past 3 runs ive died from injuries not related to zombies:

My first run i got lacerated by a tree branch off spawn and died from a fever,
I found antibiotics one or two days into the sickness but it never went away.
My last 2 runs i was killed by fever again because i jumped into glass shards not knowing the shoes on my feet were broken.

I do have the slow healer perk on, and the wounds did say infected as i couldn't disinfect them in time but I made sure to stay really well fed and got plenty rest. Im playing on B42 and want to know if it could somehow be a mod, the slow healer perk, a skill issue, or a bug. It doesnt seem right that I keep dying from infections when I took antibiotics (the 1st run), stayed well fed and got plenty of rest - am I missing something?