odds of passing hsv 2 from female to male?

As long as you are not going through a visible outbreak right now, then you are safe from passing it on. Herpes comes in many varieties, and one of them is the chickenpox. Chickenpox is only infectious while you're undergoing an outbreak. Once the outbreak is over, you still have chickenpox, but you are not going to pass it on, the pox is dormant at that point. It's same for any other type of herpes, including genital herpes.

Condoms are of limited usefulness because they don't protect your partner from the entire affected area. However, he should wear them anyway.

The medication does help prevent transmission, and of course you should not have sex when you're experiencing an outbreak. But you do need to be realistic and honest: it is actually possible for an affected person to pass on the virus when he or she is NOT having an outbreak. The medication makes the chances of that relatively low but does not reduce them to 0. See below:

I've never heard that a headache is indicative of a outbreak, but tingling in the groin and genital area (not the spine) definitely is. Other signs include muscle aches, nausea, and painful urination.

If you're having sex when you're in between break outs, and your taking antiviral medication regularly, his chances of getting it are very small.
If you've had those symptoms with previous break outs, then it could be a sign of a break out. I have the same thing but never had that as a symptom of a break out.