Keep getting viruses

[Baxdream]

I'm mid 40s with no obvious signs of menopause. I just keep getting ill on the last 9 months. I work in a stressful environment with shifts but I have my whole adult life.
I'm going to ask for blood tests and I'm taking berocca daily.
I'm relatively healthy- gym, weight and food.
Does anyone have any recommendations of what to do or take?

Sounds like its time to rethink the stressful environment and shifts, you can't keep that up forever. I haven't read it but there's a book called "Your body keeps the score", it could be that is where you're at. Best of luck...

Do you have children? Are they in nursery or school?

Just older children so no worries there. I retire in 6 years so I'm not giving it up although I'm also not getting promoted anymore.