You have to wait 3-4 weeks after the abortion.
Nothing goes inside for 1-2 weeks and by then you will have to use protection.
If you weren't protected you might be pregnant again and the risk for infections is higher then usual.
The nurses should have informed you of this information after the abortion took place but you shouldn't have sex for 2 weeks! Just make sure you take your antibiotics! And stay protected! I know that...
Yes after 3 weeks. And use protection.