Help ? Please read and advise

Hey guys

I’m due on my period in 6 days and feel SO different this month ... me and my SO have been having unprotected sex I came off my pill a few months ago now so my cycle is regular...

I am SOOOO gassy, bloated as hell & rather nauseous, exhausted but keep waking up in the night to pee then unable to get back to sleep.

Is this PMS that I haven’t experienced before ORRRRR could it be early pregnancy?