I share a lot of your feelings, I often feel really ugly and I have huge issues with my teeth, nose and breasts.
Sometimes what I try to do is imagine something happens to me and my face becomes disfigured, or imagine I was born with a deformity. Say something like... somebody throws acid in my face, or I'm in a fire, and my face becomes covered in burn scars. I try to think, if that happened to my face, would I look back and see how, actually, my face was FINE before, and I would do anything to have that face back, even if it wasn't perfect..?

Sometimes you see these shows, and there's like, a kid born without a nose and a mouth, or something, and their deformity is soo obvious, and I think.... I'm lucky. I'm not gorgeous, I'm no Beyonce, but I have a nose and eyes and mouth where they should be, and they're not so ugly that they're deformed, and it's really just my personal opinion that it looks ugly. Ask those other peole who have to live with deformities etc, and they'd think we were lucky and looked great.

Not sure if that will help you, but it helps me.

With your weight - you can change it.
With your face - you can change it, but I'd recommend trying to change the way you think of it, because that's of more benefit to you mentally, and also cheaper. If you liked yourself more you might accept that you look good enough, or even pretty.

When you're with people, it doesn't matter so much what you look like, but rather, what you're like to be with. I know you didn't want to hear it but it is what's inside that matters. It's better to work at being a person who is fun to be around (not saying you're not already) cos in the end you will benefit so much more from that than plastic surgery.

If you decide you do want to change things, and think it will give you more confidence, go for it... but it might not change as much as you think it will. Ultimately you have to be happy about you as a person, not your outer appearance, cos even with age that's going to change and it won't seem so important when you're older.

I do understand that it upsets you, I get like that a lot too... but, I do hope you can work on at least changing some of that, the way you feel about yourself. You deserve to be happy regardless of what your face looks like!