I totally understand you. Same here, I thought I did everything correctly, but nope, I had to redo one of my test. Anyway, it was super stressful because that's another $100 to spend, but I google it to find a community clinic. There're a lot in LA area. I called every clinic until I found one that only charge my test (Quanteferon Gold for TB) for $15 instead of a $100. Maybe you could try this number. Tell them it's for school, so they'll not charge you a lot. 5205 Melrose Ave. LA, CA 90038 P: 323-769-7800. Call today because you have to make an apt.