Could I be pregnant?

I haven't had a period in a few months. My cycles are irregular. Not even positive if I've been ovulating at all because I haven't temped or taken ovulation tests yet. Sunday I got a migraine which is abnormal for me and even was throwing up from it. Made me so sick to my stomach. Then I got a pimple which only ever happens right befor AF shows so I assumed I was about to start. I started cramping and was sure it was AF. But every day I've had cramps but no AF at all. Could these be pregnancy signs instead? Could it even be possible to be pregnant with these irregular periods? I know only taking a test will know, and I plan to tomorrow morning. But I feel like it would be impossible and why waste the test ya know? I just don't want to get my hopes up :(