Its not very rare to get a negative result when you're actually pregnant, and VERY rare to have a positive result when you're not pregnant! Perhaps you tested early or drank too much liquid or had too much caffiene before you took the tests that ended up negative.
So I would say that you are, in fact, pregnant. Wait until the morning or whenever you wake up after sleeping for a long time and take a test. You'll know for sure then
And yes, after a certain amount of time the HcG hormone will double every day as the baby grows, so the line will continuously get darker if you were to take a test every day.
If it comes out negative all over again, there's a possibility you could have been pregnant for a few days and the ovum didn't take, resulting in a miscarriage. Many women have miscarriages without ever knowing they were pregnant in the first place, and its very common. I would assume if I got 1 positive and then a bunch of negatives, that was more than likely what happened.
Ive been TTC for 4 years, and Ive taken many tests and many different brands of them. Ive never seen an "evaporation line" on any of them.. even 24 hours later. I usually take the cheap brands and they've always been right so far (negative)
