I have been having these terrible muscle spasms after I workout where my muscle lock into a flexed position and cause much pain.

my post workout bcaas 15mins later fruit 40g whey protein 5g glutamine 5g creatine then sex or masterbation (sorry but i dont know if this is causeing it) and then an hour after post shake 5oz meat/chic/fish 5oz potato 1 cup veggie
what am I missing and what could be causing this!