Ladies!! What do you think?

I've been tracking my periods since Dec 2017, was also on Nuvaring until March. My husband and I decided we wanted to TTC baby #3 in April, but didnt start trying until June. My periods are always on time, unless pregnant. But today I'm SO CONFUSED, because I'm days late.... I've taken 2 tests day 1 late and day 4 late, both have been neg. With baby #2 I took a test on the 18th that was Neg then retested on 27th which made me 5 days late and it was pos. I don't know if I'm weird with tests or what but this feeling sucks... Any suggestions? Atm I don't have the ability to go to the dr to get a blood test, so I guess it's a waiting game?