Mocking someone with a beard

Q: A man started keeping a beard after shaving for a long time. He is a Muslim. My father told me that "to be true he was looking better before"(because that man doesnt really look good after he started keeping a beard) I also agreed with my father saying that he was looking good before because when a man leaves his beard after shaving it for long time, he does not look good but after the beard grows he looks good. I had seen another man (who is a Muslim) who had shaved for a long time then left his beard and he too was not looking good but now he is good looking because of a big beard?

My question is that: Is there any affect on us being Muslims? Because we said that a man is not looking good while he was obeying Allah and His Messenger (sallallahu alaihi wasallam) by leaving a beard.

Mocking Islamic teachings

Q: A boys birthday was on December 26 and I said to him that it was better if it was on new year.

Now my question is that I supported new year and I supported something haram (by saying that it was better if it was on new years day). I rejected Allah's rule and supported something haram.

1. Does it affect me as a Muslim? If yes what to do?

A boy said to me that celebrating birthdays is haram and I said that celebrating new year is also haram. Then I said that haram cancelled a haram as we do in maths where a numerator and denominator cancel eachother. Then I laughed and the the boy laughed too.

My question is that I made fun of Islamic rules by cancelling the haram of it in a funny way. I read in a place that making fun of Islam leads to a person becoming a kafir. Is it right? and does it have any affect on mmy imaan?

Bleeding gums

Q: I very recently had my wisdom teeth removed, and will have another one removed in the next few weeks. After my tooth was surgically removed, it bled continuously for hours (after such procedures, there is continuous bleeding expect for 24-48 hours). Now, I know it is not permissible to swallow blood, however I cannot continuously rinse my mouth, in fact rinsing and spitting to harshly after such surgery can lead to dry sockets which are very painful. I also find it very difficult not to swallow for such a long time (it seems practically impossible for me). What should I do about the blood in this situation? (Note that this is not a small amount of blood). Also, so far I have been praying by having a good supply of tissue in my hand or on the ground next to me and spitting the blood out onto those as I pray. Is this acceptable? Lastly, how do I eat in this situation (when whatever I eat will no doubt mix with the blood in my mouth)? Thank you so much for your help. May Allah bless you.