Confused and could use some help

So I'm a couple days late on my period , but after being in the depo shot for a number of months, my cycles have been all messed up , not so much skipping months but more like getting my period at least twice a month. . So far no period ( fingers crossed baby dust ) but i have tremendous pressure down there ( in my privates ) that will come and go .. and I've had bouts of nasua here and there nothing major yet .. I'm just wondering has this happened to anyone else early in they're pregnancy ? Not sure if I am or not or if my mind playing tricks on me. . I plan on giving it a few more days before taking a test .. just curious for others opinions