I understand your concern.
Even if it is unprotected sex there is no chance of pregnancy
. Because the abortion
was done recently. And the shortness of breath
which you are facing is not a specific symptom of pregnancy and could be due to other medical reasons.
You can get a Beta HcG
test done from a reliable lab to confirm if your pregnant or not. This is a confirmatory test for pregnancy.
So. Please do not worry.