 [ Symptoms ] after giving me a blowjob my gf found a cold sore is there a drug to reduce the chance that i will get genital herpes  after giving me a blowjob my girlfriend found a cold sore the sore was very early stage and barely visible 12 hours later it is still barely visible  is there a drug i can take to prevent or reduce the chance or contracting genital herpes  please help [ Disease ] hi this could be to a number of reasons stress and a change in diet can cause late periods other factors are age could this be the start of the menopause i would try not to worry to much as your thyroid and hormone levels are at the norm base line if you are still worried perhaps ask to see a gynaecologist to put your mind at ease