I took my blood pressure, first thing in the morning, before i ate or anything, and it was 90/76. is that too low?

NO: Your body may be functioning well with this BP. Depends on your height & weight.

The basics: You blood pressure needs to be high enough to push your blood around & keep your organs functioning properly. When you are thinking clearly (brain works) and your body continues to work well, it is fine. If you were sick in the hospital & BP dropped it might be a sign of a problem, but the levels are usually lower & the changes in your functioning are obvious.