How about I tell his wife that he got me pregnant and then report him so that he loses his medical license?
Why tell his wife and report him?
He abandoned me the second he heard he got me pregnant.
His wife deserves the truth, and reporting him for something outside the field of medicine is iffy at best. However, you should also take responsibility for knowingly getting involved with a married man.
I tried to ignore my pregnancy to get rid of him, I should get over it.
You shouldn't get over it, because he shouldn't have cheated on his wife and ran out on you-- but you also should have never agreed to cheat with him, because you should have known that getting pregnant was an option that could have happened. At this point you're both in the wrong, and maybe you should just tell his wife and then let him be.