Sufficient treatment for STD

If you have received unprotected oral sex from a women and than within two days start taking z-pak as well as 3 doses of 1gram IV Keflex for another infection issue(Non sex related) would this most likely protect you or treat any STD that you may have acquired (Except for Herpes or HIV) -  referring to Chlamydia, Gonnorhea (Gonorrhea), NGU or Syphyllis?  

It's almost like prohylactically being treated with antibiotics even if you have no STD symptoms.

[auntiejessi]

Yes, it would probably prevent any infection.

Aj