Blood and Roses is a 1960 French film, which may be about a vampire and may be about a woman who undergoes a shock and resulting psychological disturbance. The movie lets you decide. Mel Ferrer stars. I enjoyed watching this.
The movie is loosely based on the 1872 Joseph Sheridan le Fanu book Carmilla, which can be read online at many different sites. You can have it read to you here courtesy of Librivox.
full film via Youtube:
The New York Times calls it an "exquisitely mounted reprise of the old human vampire theme".
Moria gives it 2 1/2 out of 5 stars. DVD Talk calls it "One of the most coveted but elusive Euro-horror delights from the 'first wave' of the late 1950s and early '60s"