Poyda I am a female and still shave with a disposable razer. Always use caution, but I still do fine. It is always with use of common sense and caution. Just do what you feel and use caution. Doctors use what they want to shave with, so should you.
My doctors told me same thing, infection is the bigger issue just like it was my bicuspid valve as the risk of infection forming around the valve hinges and such is higher, same reason they still want me taking 4 x 500mg amoxicillin before any dental work still.I too read all the bologna about shaving only with an electric razor while on warfarin. One visit to my cardiologist and I asked him why no razor blades. I was a bit sarcastic telling him I found if difficult to believe I would bleed to death from a razor knick and he said the bleeding wasn't the issue. The worry was more for a blood infection caused by the cut.
This does make sense but still if you wash your face before you shave and keep your blades clean it seems to me there should be no problem. I cannot stand electric razors. I only ever owned one that didn't irritate me all to hell ( a Braun). So I use good quality blades and a good shave cream and just go slow.