I'll give you the benefit of the doubt, that you weren't snooping -- i.e., you ran into your partner's valacyclovir (Valtrex) prescription by accident.
The majority of valacyclovir prescriptions are written for genital herpes. However, it is also prescribed frequently for oral herpes; or perhaps somewhere along the line she had an outbreak of herpes zoster (shingles). But for the rest of this reply let's assume she has genital herpes.
Even without treatment, the chance of infecting you probably was quite low. Among mongamous couples in which one person has herpes and the other doesn't, who have unprotected sex an average of 2-3 times per week, HSV-2 is transmitted in only 1 in 20 couples per year. That translates to one transmission for about every 2,000 episodes of sex. Since you used condoms, which are perhaps 80-90% effective against herpes, and had sex with your partner only 10 times, the chance you were infected is extremely low. The valacyclovir would have reduced that risk by at least another 50%. Finally, the fact that you haven't noticed any symptoms is further evidence you weren't infected. By itself, none of these factors is foolproof. But considering all factors together--only 10 exposures, condom use, your partner's valacyclovir treatment, and lack of symptoms--the chances you have been infected are virtually zero.
What do do now? Most experts agree your partner should have told you of her infection. But as I said above, perhaps there is another reason for the prescription. And even if she has genital herpes, I hope you will approach this with kindness and understanding. She might have been waiting for the right moment; might have genuinely believed she was protecting you sufficiently; might have been frightened of your possible reaction; and so on.
Also consider the future of the relationship. Herpes is mostly a minor deal. If this relationship is rewarding and especially if you believe it has a long term future, please don't let herpes interfere; herpes is too trivial to be allowed to have that effect. But if from your perspective this is only a fling, or if you remain uncertain about its future, then taking precautions against infection makes sense.
Finally, you can always have a blood test to see if you are susceptible. Half the population has HSV-1 and 20% has HSV-2, so you could already be infected with your partner's HSV type. If so, you can't catch it again and there are no worries.
Bottom line: Not much risk here. You'll need to work on the relationship issues.
I hope this helps. Best wishes-- HHH, MD
Oral herpes risks HSV-1 genital infection, but the chance of getting it for any particular epiosde of oral sex is vanishingly low if the oral partner isn't having a visible oral herpes outbreak. Anyway, there's a 50-50 chance you're already infected with HSV-1 (half of all adults), in which case you're immune.
In theory, shaving might increase the risk slightly. I have never seen herpes in the shaved (pubic hair) area, so if there is an increased risk, it is too small to worry about.
I had also shaved my genital area the day of intercourse, would that make my skin more succeptable to herpes transmission from my partner? and would the unprotected oral put me at a high risk of getting herpes if she had no symptoms at the time?