To think my work was unfair?

[t3rr3gl35]

I have been in my job for 2 years. Have had 1 day off sick for an operation not long after I started, returned to work following day, took no time off for post operative chest infection - simply carried on and worked my way through. Have had recurring chest infections since but no sick days.
Have been unwell, varying degrees for a few weeks and undergoing extensive testing to determine source of recurring infections. Took turn for worse at end of last week, was so unwell this morning that I couldn't catch breath and was mildly confused. Called GP and was given emergency appointment. Spoke to manager and said I was very unwell, had emergency appt and needed to go. Was told I would be allowed to leave in time for my appointment but for next hour I was to remain at desk and work. I struggled through it, saw GP and was referred to hospital. Spent all day there and have to return tomorrow for further tests.
AIBU to be angry with manager? I am absolutely dedicated to my job and was very clear that I was too unwell to be at work, obviously confirmed as the day unfolded. I was spoken to and treated like a naughty schoolgirl - would it be unreasonable to raise a grievance over this - manager is fully aware of health history?

YANBU at all - I hold a management position and if I saw a member of my team looking so unwell, whether they had a doctor's app or not I would be suggesting they go home and rest and I would think no less of them.

Your manager sounds like an arse!

I hope you feel better soon

Sorry to hear you are so unwell.

When I was a manger, I've made people go home for less, it's not productive to have someone in work who can't function 100% but who also may spread any infections or viruses.

I can understand how you feel though, nothing worse than having a manger who thinks they are in 'control' of a classroom, been there, done that.

Yanbu what a shit manager and hope you're on the mend. I wish everyone has my manager. I'm like you and insist on going to work regardless of how unwell I am and went in when I had my first period 8 weeks after a miscarriage, now I flood normally anyway, but this was awful and I was sat at my desk semi conscious, pale and short of breath. She took one look at me and told me she was taking me to hospital and I wasn't to argue. She even diddled my sick record for me so it didn't hit a trigger point.

She values her workers and I wish more managers did too.

Thank you for your responses. I'm also a manager and I treat my team with what i hope is respect and dignity. Just feel that I was treated very badly but wasn;t sure if being unwell had skewed my perspective. I think i will raise it with her when I return. If, as I expect, she denies wrongdoing i will go to HR and raise it as a grievance (have never done this before in my entire work history).