Scared confused !! :,/

PLEASE READ GUYS PLEASE IM FREAKING OUT!!!!

So I got my nexplanon on January 23rd. But before I got it me and hubby woilsntnuse protection. So that made 2 months PP. I've been feeling like I'm pregnant again! Haven't got my period this month at all and I get it every month. I've had nexplanom before and started my period every month never missed it. I keep,taking test and they come out negative. I've been throwing up and feeling nausea like I did with my other 2 pregnancy .... I FEEL pregnant Idk if its all In my head. My hubby wants to tale me to the hospital so they can do a sono to be sure but I don't want to go.... Have any of you take a pregnancy test while on this birth control and came out negative but you actually WERE PREGNANT ?!?! PLZ COMMENT PLZZZ