Definitely get the test. No big deal. The chances are extremely slim, but I say if it is causing you undue anxiety.....go to lab. It will be one thing less to worry about.
I was never worried, altho' had several partners, and didn't always use condom or they would break. Don't laugh, but my pastor was counseling me at the time, and he sent me to his family's doctor for the test. I felt much better after....and was more informed...so all good.
Good luck.
Probably very low but just go get an anonymous test for HIV/aids to feel better.
the chances are very slim if he didnt ejeculate inside you,did he wear a condom then?