New here, need some advice on meds for toad!

[Magicl Merlin]

Hello, I'm new here, so I'm not really sure where to put this. I'm putting it here because this area seems to be the busiest, but a mod can definitely move this to the correct place! Thanks!

So, a few days ago, I accidentally stepped on an American Toad. It was dark, and I didn't mean to. I felt so bad about, I made him an enclosure and brought him inside. I get that its February, but here in NC, we don't participate in normal seasons. It was really warm for a few days, with really warm nights, so I think it brought some of the toads out. Now its back down to the low 30s at night and low 50s during the day. So its too cold for him to go back outside, injured.

On to the toad. He doesn't seem to move a lot, I'm not sure if its from being hurt or if its because its winter and hes really not supposed to be out of hibernation. He seems to have eaten 3 of the 4 small crickets I put in last night. His right side eye and front leg seem to be mostly effected.

His enclosure is a few inches of potting soil, with a few inches of coconut fiber on top for him to burrow. A little log hide, and a shallow water container with rocks in the bottom, so he could soak and still get out.

My questions are, what antibiotics can I use? I have an animal pharmacy here, so I actually have several types of antibiotics on hand. Can I give him any pain meds? I have animal pain meds as well.

I also wanted to know, what is the normal behavior of a toad? What do they do? I know they're nocturnal. So are they supposed to just sit around all day? I'm just curious, to see how "normal" this guy is acting.

I plan on rehabbing him and then setting him free. If I feel like he won't be able to live in the wild happily, I will keep him and care for him his whole life. I feel so bad I stepped on him, I'll just take care of him his whole life.

Thanks for any help! Any other suggestions would be greatly appreciated!