Positive AND negative?

Alright ladies. I am completely lost.

With my first pregnancy, one of my first early symptoms was sensitive teeth.

I noticed today my teeth being very painful with the same sensitivity as my first pregnancy.

So me being who I am, took a thousand tests.

I have been off of birth control since May, and my husband and I have had unprotected sex since then.

I had my May and June periods as usual. (June cycle started on June 20).

Here is where I am stumped. I took multiple tests, multiple brands. Even went out TWICE and spent an upwards of $50 on tests just to make sure.

I took 2 clear blue: two separate boxes, both negative.

One Equate Digital; Negative.

1 first response; negative.

2 rexall, 2 separate boxes: negative.

3 Equate regulars, 3 DIFFERENT boxes; all with a very very very faint line.

1 $1 HCG one; negative.

What are the odds I would get THREE False positives from THREE DIFFERENT boxes??

I did check before I took the test to make sure absolutely NO LINE was visible before adding urine to every test I took.

Help!