This question should have been submitted to the HIV/safe sex
Even without a condom, sex
in the presence of menstrual blood elevates the risk of HIV transmission only a little bit. But you used a condom, so there was no risk, even if your partner had HIV--which, from your description, she almost certainly did not. Blood on skin is not a transmission risk.
The water test was unnecessary, by the way; if the condom didn't overtly rupture, it was intact enough to prevent HIV.