what do I do now??

[lovehamsters01]

ok so this is kind of a long story but I'm going to try to make it quick.
one week ago, I noticed blood in my robo hamster, Coco's cage. I couldn't tell where it was coming from.
I freaked out because usually this means UTI or tumor from my previous experience. However, Coco was acting very normally, without any behavioral changes so I didn't feel like it was a life and death emergency.
I finally managed to get her to the vet today. I hadn't noticed any fresh blood yesterday or today, but blood is never good, and I wanted to get her seen.
As expected, the vet (who I honestly wasn't impressed with because she called Coco a Russian dwarf when she is very obviously a robo) said I can do an ultrasound to find out but its either a reproductive infection or a tumor.
i decided an ultrasound wasn't so necessary so I chose to put her on an anti-inflammatory and an anti-biotic and go from there, knowing that if she started bleeding again in the future, it's probably a tumor, and if not, then it was an infection. the vet also decided to give her some fluids, iron, and vitamins to make up for the lost blood.
I was confused because Coco was still acting normal, even though its been a week and hamsters usually get very taken over by infections so I thought to myself its probably cancer, but regardless the meds should help for now.
So I paid a fortune for the appointment, fluids and meds and went home to give Coco her first dose. She got anxious (she is a robo after all) and was letting off some steam in her wheel in between medications. when I gently slowed down the wheel, I noticed fresh blood ON HER FOOT! so clearly this is no tumor or infection, and instead a wound on her foot. So I'm extremely annoyed at the vet for such a off-mark diagnosis but I have a few questions for now:
1. How can a hamster get hurt on the foot? is this a problem with a nail?
2. is there anything to do for it?
3. should I just completely not give the anti-biotics and anti-inflammatory?
4. is there any chance the vet will reimburse me at least for the meds? (which are opened because I didn't realize until after) I spent $500 for very unnecessary treatment due to a very wrong diagnosis! and the appointment itself is only $188, the rest was all fluids and meds.
If anyone actually took the time to read this, THANK YOU!

[Teddy001]

I’d suggest you phone the vets back, explain that your hamsters foot is bleeding. Ask your vet if you should continue giving the medication. Hamsters can injure themselves on things in their cage. Did your hamsters nails look injured?

[lovehamsters01]

I called them, and they said I can continue the medication. However, I decided not to since there was really no need and I don't love the idea of drugging her up with anti-biotics if its not necessary.
I do think it was a nail since I couldn't see any wound but by now it hasn't bled since that last post so I decided to leave it. It was definitely a waste of money to bring her to the vet but better safe than sorry and I'm just happy at this point that it wasn't anything more serious
Thanks!