Hello Mick
I wasn't sure whether it was just you who was sucked or whether you sucked her also.
There are cases where sucking someone else who is HIV positive has resulted in a new HIV infection in the sucker. This is rare and sucking someone else is generally regarded as a low risk for HIV.
Being sucked does not give any risk of HIV infection.
Sucking or being sucked may though expose people to other STD's like syphilis, chlamydia, gonorrhoea and you should test for these before resuming sexual activity with your girlfriend.
You can test for HIV reliably using an HIV DUO test from 28 days. You can test for syphilis very reliably from 28 days also. Testing for chlamydia and gonorrhoea is best after around 7 days or so.
kind regards, Sean
I also wanted to know how soon would be the earliest I could go to a clinic and get tested at least for a few things so I have some peace of mind