Hi, I Usually Have Normal Period I Usally Change Pad

Hi, i usually have normal period i usally change pad 2 times a day and i always have bad cramps, last month my period came lighter i only wear panty liner and i didnt have any pain. I bought 2 type of pregnancy test equate and clearblue 2 said positive and 2said negative. I went and buy 3 more all of them says negative, am i pregnant because im so confuse i pee 6 times in 2 hours usually i only pee 3 times a day?