Late Period Concerns - NEED ADVICE

I’m almost 10 days late for my period. I have been incredibly stressed lately and I have also experienced irregular cycles in the past due to PCOS, but it’s been a couple months since it’s been wacky. I’m worried about the possibility of being pregnant. I’ve only had sex once since my last cycle, and he wore a condom. I had the WORST cramps I’ve ever had in my life a week ago. Had to stop working in the middle of a haircut (I’m a barber). StABBING pains. Idk if it’s my hormone imbalance or PCOS acting up, I’m just worried and don’t know what to do. I took a test a bit ago and it came back negative. Plz help! It’s my 21st birthday Jan 6th and am supposed to be on a cruise and I’m worried I’ll start it on the cruise or won’t start it at all!