What's the body doing after the vaccine?

[SandyStarfish]

I'm day 4 post Pfizer vaccine. I believe my body creates a spike protein similar to the spike protein of Covid, then my body destroys this protein, and then knows what to do if it ever encounters it again...

Is there a timeline for the actions? As in.. day 1 post vaccine, body starts to create protein. Day 7 body begins fighting... etc?

And which day post-vaccine, is the 'fight' over?

By 2-3 weeks post vaccine you should have an immune response ready for if the body encountered the virus.

So theoretically, if feeling a bit tired / weary post vaccine (which I assume is down to the body creating antibodies and fighting) it should pass by 2-3 weeks?

I am 3 weeks on from Pfizer. Had sore arm for a few days and looking back I was very tired the first week, I actually came home from work and fell asleep for 30mins each night. Also slept really well during the first week. Since then I’ve felt fine.

Thanks @Angrymum22 I'm feeling mostly fine, just tired and low mood

I think tiredness should pass after a few days? Everyone I know who has side effects like this felt better within days