Headaches with Herpes?

Hi,

I have had a strong constant headache lately and I've felt really tired.

I've noticed these symptoms after my last (unprotected) sexual intercourse.

I also have red patches on my genital area but they are not painful and don't itch. I do have one blister-looking inflammation though but should I be worried about it?

Could this be herpes? Has anybody had similar symptoms?