During the come up your body is going to feel "awkward". Its just part of the experience that takes place. You need to get past the mind state that its always going to be bad and you are going to need something to get around that.
Your body is under a very intense chemical change on psychedelics and its just reacting to what good is about to come.
During the come up, do something that makes you comfortable. I don't like walking around when coming up because I feel really strange. I like to sit down, relax and try and do something that normally calms me down or relaxes me.
Bad trips are caused because of set and setting. If you put yourself in a situation that makes your concerned or paranoid, then obviously things aren't going to be as pleasant. Using hallucinogens will increase the need to bring up things you normally are paranoid about and things that make you nervous.
Find a pleasant setting that you can feel comfortable in, maybe less people, smaller dose, something.
Obviously things aren't working for you. You can't fight the come up and awkwardness, you just have to ease your mind and realize its just part of the experience at hand. Yeah the come up can be weird feeling, but just think of what is to come. Then when the weird feelings subside, enjoy what you have.
Back to the original question tho, I don't know how xanax works with lsd. Lsd is great by itself, if you have a hard time enjoying the experience, i don't think psychedelics are for you!
I hope you find something in this thread that works for you, because LSD is a beautiful thing that should be enjoyed by itself!