I don't think I had any bad effects from my recent and only bout to be honest.
I remember leaving my morning coffee for a couple of days as it tasted horrible, had a couple of days under the duvet on the settee dozing and had a snotty nose which has only just cleared up and the bad sleep pattern is still happening.
I didn't really suffer with daytime headaches but they were waking me up early then stopped me getting back to sleep. Once I was up though they cleared up fairly quickly.
Can't say I was particularly fatigued either as I was still walking the dogs, working and gardening as well as cooking, cleaning and shopping.
I've nothing to compare to though as I've not had COVID previously and didn't have any symptoms after any of my jabs.
Hopefully you'll all fully recover soon.
I'll add that I've had one of the worst attack of coldsores I've ever had, with 5 in quick succession!!