Could I be pregnant or just going crazy ?!

Okay so I’m going a little crazy over here. I’m 5’5 and 280lbs. Me & the hubby have been ttc for 16 months, I have irregular periods so a lot of money goes to pregnancy tests 😅😅 anywayyyyy ; I had my period after 2 months ; (was on birth control for 2 weeks , stooped got crazy sick *Taytulla* ) then on March 29th finally saw AF ! & it Lasted the normal 6/7 days. A week after my period I started feeling off.

I became very Nauseous , everything I eat ; I’m nauseous. And the Pounding headaches are the worst ! Never mind the fact I’m getting hot flashes like I’m going through menopause &, I’m only 20!

I started cramping and feelin like my period was about come today & According to my app my period should have came 4 days ago. But then again my periods are irregular... Can I be pregnant ? Should I take a test ? Or am I just REALLY going crazy ?! #HelpMe!