Hello Covid my old friend...

[Knamechange]

Has anyone had it twice, or think they have?

I'm currently waiting for a test result and I'm damn certain I had it in March. I was quite ill with multiple symptoms for weeks, was on the long Covid thread for a bit. No test of course.

At the same time I'm wondering if could it be some kind of relapse so much later on?

Symptoms similar but milder.

@Knamechange it's known that as you recover, if you push yourself too hard (which might not seem that hard at all) some symptoms can return. Rest, then gradually increase your activity levels again.