Can herpes tingling last for a week? no visible sores.(i do not know status but have weird tingling and once had a swollen node after sex- no lesions)

Yes, it can.: You can definitely have herpes without sores. Most people who have herpes don't know they have it. It's great that you're in tune with your body. I would assume the tingling could be herpes, and wear a condom with any sexual encounter. If you ever develop a lesion, get seen right away so it can be tested for herpes. More at http://www.cdc.gov/std/herpes/stdfact-herpes.htm