Feeling 'unwell' week before my period due...

Hey everyone! First Post on here! Just looking a bit of advice.

My past 3 periods, I've noticed I've felt unwell - achy, cold, dizziness, lethargy, feeling like I'm not 'present'/distant and generally unhappy - in the week before. Its only struck me today that this could be connected to my period?

I've previously thought it was an allergic reaction to caffeine... And stopped consuming it but, these feelings have continued!

There is a bug going about at the moment which I think I have this time - I've been unable to go into work most of this week due to feeling to shitty 😢 if anyone has any advice on this it would be great!

Thanks in advance ❤️