Not completely convinced I’m pregnant but everyone around me thinks so

I have polycystic ovarian syndrome so I don’t believe I’m pregnant (periods are always regular& on time) I just think my polycystic ovarian syndrome is getting the best of my body. I’m 5 days late on my period, and if I am pregnant I’m only 4 weeks and a couple days. Since last week I’ve been showing signs of being pregnant. I’m completely exhausted no matter how much I sleep, nauseous as all get out, stomach cramps, bloated, have a massive headache and mood swings. My mom said she had the same symptoms when she found out she was pregnant with me. I’m waiting to take a test due to it being so soon just thought I’d get other people’s opinions.