My lmp began 8-10-13. i have irregular cycles.i took a hpt and it had a second line (ind. +)btwith no visible color. same result with 2 other tests. one by a different manufacturer. are they positive?

Positive: Home pregnancy tests are quite sensitive and specific these days. If there are two lines the control and the test line , that indicates a positive test which means a pregnancy. A negative test may not always mean no pregnancy--if the HCG levels is very low or the urine very dilute the test may be falsely negative.It is rare to be falsely positive.

Not sure: It sounds like they might be positive - the main way to be sure is to go in for a blood test tomorrow.