"Lovely staff, terrible organisation "

I was booked in for a miscarriage follow up at a specific time. I planned my day around my 10am appointment here. I was there for 7 hours!!!! I left at 5pm. I was feeling well before I had to spend 7 hours waiting for my 10am appointment. I understand waiting in a&e and urgent care, however, I shouldn’t have to wait for a timed appointment. I did not plan to spend all day there and didn’t bring any food/phone charger etc as I thought I’d be out within an hour or so. Nurse and doctor were lovely but if you are given specific appointments to people it should be in a different area.