I'm feeling tired 5 days in a row every week and i don't even have a cold :(

Yeah, it's normal. Your body is recuperating, give it time.

That's absolutely normal and expected. The illness is taking a toll on your body and it needs all it's resources to fight it. Don't take this as advice not to see a doctor if you were already going to because if you personally feel like something is wrong and out of the ordinary for you, then it's better that you decide to go to a doctor even if you're told that it is indeed normal for a cold because who knows if it's not something worse or if "normal" for you is different. But in general, yes, for colds and most illnesses tiredness is very much to be expected, even to a pretty extreme degree.

It's not unusual to feel tired when sick. It's a particularly common symptom of COVID-19.

Totally normal. Just don’t worry about it, get plenty of rest/fluids, and keep up those outdoor walks.

Definitely normal, your body is recovering. If it's still happening in a week, then I'd start thinking about going to a doctor.

I get medical anxiety a lot. That's a rule I've set up that helps quite a bit. If it still happens after a week, now you can think about going to a doctor.

I wonder if walking outdoors makes people feel more awake

It 100% does. Fresh air, direct sunlight does wonders.

Got some of this as well, started with pain in the throat last week, I slept a lot for two days, came down with migraine a day after that, and the last week I have been mentally really unwell feeling more anxious and depressed than usual. Something is going round.

When I get ill, sometimes I sleep for 18h straight, through alarms and everything...

You sleep more when you're ill anyway, but what wakes you up about outdoors is light. It's much darker inside than out by a way more than you'd think, so that's probably why you feel awake when outside.

More fresh air can never hurt!

OMG yes, I have felt run down for weeks after getting sick.

I'm having pretty much the same thing right now. Started feeling a little bad last Wednesday afternoon. Felt worse Thusday so I took Thursday and Friday of work and basically laid around all day from Thursday through Sunday.

Monday and yesterday I still had a bad headache and almost no energy. I had to rest and nap all lot.

Today I'm feeling slightly better, but still fighting a headache and very little energy. The cocid test I took was negative so either it's a bad cold or flu, but I haven't felt this sick in a long time.