all!

So here's my background on everything;

I've been doing daily OPK Strips and I tested negative around 6pm

We've been away and I forgot to bring my pee cup I use and so to test I've been dunking the sticks in my toilet.

I'm currently on my period and just starting to come off and not due to ovulate til the 27th of May earliest according to glow.

Me and my husband had unprotected sex and he didn't finish (tmi I know lol) and at about 8pm

I then tested at 10pm and its came up positive (first time ever)

So here's my question;

1.) Can give an OPK give a flase positive?

2.) Could dunking my strip in the toilet be effecting the strips?

3.) Could this flase positive be because of the pre-cum? (Tmi i know, sorry again)

4.) Could it also be a flase positive because of my period ending?

Any help would be great!

(Pics below)