That's what happens with whey protein.
Switch to casein or egg.
Directly after workout, take BCAA and amino acids.
Do any of u ever get what i think is low blood suger or energy gaps, i sumtimes get it kinda late morninnig so have square of chocolate or try eat as close to as possible.
I mean i feel bit shaky adn hot etc, and i eat and it soons goes away. even on training days if i get it and eat it goes away and i can have amazing session.
davie