Could i be pragent if i threw up at 2am and my period is not normal.

My period is Not Normal and i threw up at 2am and i was feeling alright the days before and later that day and in the morrnings i do feel like throwing up some but it never comes up and i get really tired during the day i also get sharp pains in my tummy and chest and i also get cramps every now and then but no period and i also get back pains and headacts and ive been eating much more so could i be pragent or could there be something else wrong with me please let me know thanks.