I haven't had my period in two months I'm going on my third, for a few weeks I felt sick and only vomitted a few times, now I don't really have th sick feeling, but I do constantly have headaches and I get super dizzy and head rushes all the time my stomach has grown larger and my breasts hurt incredibly bad and all I do is sleep and eat. Im worried that I may be pregnant. If I'm not what else could this be is it something way more serious than I thought it was

Take a pregnancy test... it's a quick easy way to find out if your pregnant or not... Then, regardless of the results, make an appointment to go see your doctor.