I had my tubes tied almost six years ago, and my periods never late ever! I'm now two days late and have taken 8 pregnancy test all different brands and they all come up positive well after the wait time. Any advice?

Well based on the tests I'd say you're pregnant. I have heard before that even when you have your tubes tied there is a chance for an egg to "escape" and you still have this super tiny chance of getting pregnant.

I'd make an appointment with your doctor immediately to be certain.

If they have all came back positive then I would say you are also false postives are rare.

They all show positive after the ten minute time limit. Do you think it's still possible?

They say that if it shows up after the 10 min period then the test is inconclusive and the results can be wrong, HOWEVER with that said if you have taken several test and all have come back positive then you could just have a low HCG amount in your urine and it is taking longer to register.
I would suggest going to the doctor so they can do a blood test.
It sounds like you are pregnant.
Also you may want to take another test using first morning urine and if the results still come back positive then you are pregnant.