I had similar too.
1st round was fine straight after then when I used the injection the next day all my bones hurt like the flu. And I was tired and I think I bloated a bit. I had to get myself moving about as I remembered one of the nurses during chemo said that moving about helps with the side effects. The last 4 days have been almost normal other than dry mouth and constant needing to pee because I'm drinking so much water as I feel dehydrated all the time
Next week is round 2 hopefully it's the same. But I feel like my hair will fall out then my skelp is getting itchy (or maybe it's my immagination)
