Help, may have been infected

Dated this lady for three weeks, has sex Sunday night unprotected. She tells me Tuesday she has herpes. Wasn't that nice of her to let me know after the fact? Unreal. WTF a matter with her?

She said she has not been active for a year, takes Valtrek, etc...I'd tell you what I said to her, but my post would be deleted due to bad language.

Ok, what are my risks? Chances I will get this? If I do have it when will I begin to see symptoms? What type of sumptoms. We had sex Sunday night and I have been staring at my Johnson since.

Advice needed and wanted.