I have to say a couple words here if you will. The bed sheet has a red stain and even though we tried to clean it did not go off - blood running out of nose while falling asleep. Sorry for this one.
Regarding the wall, I was out with other friends and when I got back to your apartment I saw this on the wall and asked the others whether they knew anything about it, because I simply wouldn't like this on my wall and they told me noone did anything and it was there. Even if I did not quite believe them I had no other chance. I cannot express how sorry I feel, because this is not how I would want someone to splash my wall too. Nevertheless, it's happened now and it's important to somehow fix it. I remember it was around 3-5 small dots,therefore, it should not be a problem to re-paint. Shouldn't cost more than 2 dollars and I will reimburse it if you send me the bill. Also, if it's red wine it should be washable even if dried, so it's simply weird and I'll check with my friends one more time.