Pregnancy symptoms two faint positive pregnancy tests and one negative..

Hi I have had cramping from crying today.... been tired, crying alot, peeing, eating late at night, moody, boobs sore, gassy, alitttle nauseated on and off, and I took a test after missed period (1st day),faint super but faint positive(assured dollar tree)...then 4 days later took another hpt , Walmart equate plus negative and a faint positive.Then yesterday I went to a pregnancy help center And the small pregnancy test said negative after 2 minutes.. so I'm ugh so confused

By my LMP I'd be 6 weeks