5 days until af

I am currently in my tww and 5 days until af arrives. I have been experiencing twinges in my sides, back ache when I lie down and my stomach muscles hurt as though I’ve done a workout. My nipples are tingly and sensitive when touched. I also had a really bad nights sleep and felt slightly nauseous this morning in bed. Has anyone else had anything similar or could it just be pre period symptoms? My partner and I are on holiday and have been bd’ing most days so I am hoping and praying we have done enough this month! 🤞🏻