Thanks for your query.
In my opinion you are not pregnant because after abortion
some women start ovulating as early as second wk. but most of them ovulate in 3rd and 4th wk.,so you have sexual intercourse 7th day of your abortion so chances of pregnancy
you should consult gynae for your blood and USG test,because little chances of pregnancy always be there.
Next period would be 14 days after your ovulation.don,t worry.take care.