In a previous question you stated you have a problem communicating.
You need to understand that this is the key to every question you have asked.
Accepting what others push on you will make/ has made your life miserable.
I strongly recommend you take a speech class as this will help build confidence and then arm yourself with knowledge and take a stand..
Now to your questions:
Regarding this question- most doctors are completely overbooked and unless you are persistent you will not get results.
The pain you are experiencing is NOT acceptable and should be treatable. You need to demand results. You need to be clear, articulate and firm. You need to research and ask questions and not allow them to dismiss you.
I did a quick search for “pain on ejaculation” and found this as well as numerous other articles.
Next question: Moving out of your parents home. Again you need to be firm and articulate. You are not speaking up for yourself.
Show them you are an adult by not allowing them to keep you down. MOVE OUT. Do not seek permission. Just do it as soon as you can. Start seeking a room to rent or the like now and make firm plans and save. You can do anything you set your mind to so long as you do not let others dismiss your dreams.
Getting a girlfriend Believe me- once you begin to stand up for yourself you will see results. Women want a man who can stand up for them and take care of things. Once you can do that you will have a much easier time meeting women and will be confident enough to find a partner.
One word of caution though- you need to take care of this problem before you seriously embark on a relationship. As a woman I would be devastated if I could not fully please my man even if it was a medical problem on his end. I would feel bad for asking for pleasure knowing it could cause him pain. Intimate loving relationships can exist with your condition but why should it if you can remove the problem and be able to enjoy your partner fully?
I hope you take to heart what I am telling you and no longer let the world trod over you. You have a lot to offer and will find life also has a lot to offer you but in this world you must stand up and sometimes fight for it. Yes sometimes this can be uncomfortable, but I guarantee you that the results are well worth it.
You can do this..