Should I be worried?

Okay, so I'm writing this with the faith that I will not get any judgement, so If you do not agree with this post please disregard it. 
So, about 3 weeks ago I got an abortion. After a week I met this guy that I really like. We have been hanging out and all we had ever done is fool around and I gave him a few blow jobs. One night we got very carried away and he stuck it in me one time and then came on my stomach(Hes not the lasting type, but bounces back fast). We then finished with a vibrator and anal until I came. 
I know you are super fertile after you get an abortion done, and he knows all about my situation. So he and I are super paranoid. The clinic where I had my procedure done wants me to take this home test again on the 22nd to see if i have no more HGC hormones left in my body and Ive already been to my OBGYN before this whole sexual mishap happened (premature sex after the abortion, he knew about the pregnancy and abortion). He said I have to stop bleeding for at least a week before I can be put on birth control. 
Should I be concerned? Do I have anything to worry about like precum possibly getting me pregnant again?