There are many reasons why you are not able to orgasm:
is there a lot of stress in your life? The guy in question...How long have you been together? Do you feel comfortable? Do you feel attracted to him? Is he your boyfriend? Just a friend? Fiance? Husband? Do you love him? Do you drink when you have sex?
The fact that you had an abortion may have done something to you emotionally as well as physically. Orgasming involves a lot of passion and emotions. Like the previous message, you are still traumatized by this. It will take a while to completely heal. Scared it will happen again. It does damage your body physically. Something is living and growing naturally and then is taken out, there is going to be effect from this. I have heard a lot of consequences from having abortions. Some bodies abort every baby that they try to carry thereafter. Some don't carry them normally if they are physically capable of it.
Might want to talk to your doctor about it. Good luck!