Confused

Guys I’m confused as fuck , I had sex 3 days before my ovulation date... I tested 4 days before my period test came back negative. But honestly I can’t stop eating bad food (was so good as eating healthy a few months ago) now I just can’t eat healthy!! I have burping a lot which I’ve noticed, acne on my chin (painful) and I’m SUUUPER lethargic and tired/ grumpy. My period is not in 3 days?? Is it my period or pregnancy???