Lisa, sounds to me very much as though the film was underexposed. I recommend shooting a test roll. Noting the exposures and bracketing [towards overexposure for each subject].(posted 8320 days ago)chris p.s. You can tell if it was underexposure, rather than underdevelopment. If you have no details in the shadows it was underexposure. If there is shadow detail, as well as highlight detail, but the negative is just very thin, then it was underdevelopment.