Pregnancy testing faint lines and negatives?

In the past two days I've taken five pregnancy tests, three were negative and two had very faint positives as soon as I took them. I took a picture and asked several people if they saw the line, and they did. Two first response were negative, one ept was negative, the other, positive, and the equate was positive. I am extremely confused at this point. I did one with morning pee, negative, but later that day, one showed positive. Can those two positives be false? I know about evaporated lines, these two aren't that because they appeared within the time frame. What's going on?