Yes, I had horrible, seemingly unending regrets when I had an abortion too. Funny it hits you when you have already up and done it and can't undo it. That lasted for a long year. Don't dwell on it. No brooding. If you start to, say NO, STOP. You can control your thinking.
It will pass. Stop hating yourself. I have gotten to the point that if I happen to think of it, I can say to myself, Yes, that was a drastic and emotional decision. Regrettable. Wish it hadn't happened. Wish I had talked to someone who was objective, who, I don't know. Willl never do that again. (and then take a deep breath and STOP thinking about it, there is nothing WRONG with you)
Since you are working, you will have something else to think about, good. Just because you work 40 hrs, you lucky girl, doesn't mean you can't socialize with your friends. And you have money, go out to eat, to a movie, go walking and exercise.
You do need to see a doctor about your anger. Just because you're mad at yourself doesn't mean you can take it out on others.