On Supressive Therapy, had sex once without a condom

I just started dating a guy, and the first time we had sex it was unprotected.  I have HSV-2, and am on supressive therapy also.  I wanted to know how big the risk is if I'm on the medicine and we had sex once without a condom?  Since then we've used protection, but I'm still really worried.

[Verysaddude]

Its not a big risk, but its still very possible.

[petal130]

Suppressive therapy alone is significantly effective. It reduces viral shedding by 80-90% and reduces ob's by 70% on average. Based on the below data, there a 98% chance annually he WON'T get it - so no need to be "really worried" :-)

Here are odds based on female to male transmission of genital herpes.

FEMALE TO MALE RATE OF TRANSMISSION (HSV2 ONLY STATS IS NOT APPLICABLE FOR HSV1)

If you have 100 couples where the female has HSV2 but not the male (these figures are over a year) the odds of female to male transmission are, if you do nothing other than avoid sex during an outbreak, 4 men out of a 100 will get herpes in a year, or 4%. If you do go on a suppressive therapy then it drops to 2 men out of a 100 in a year, or 2%. And if you use suppressive and a condom the chances are 1 man out of a 100 will get herpes in one year or 1%.

The Valtrex and transmission study stats are based on having sex 2 times/week.