Wiktionary
lose my head
vb. (alternative form of lose one's head English)
Usage examples of "lose my head".
For which reason, if 'We mean it' does not prevail, I may someday lose my head.
I began now to lose my head and to scream and cry out in my agony.
You simply want to make me lose my head, to work me up beforehand and so to crush me.
I have practised that honest artifice of Seneca, and in my retired and solitary imaginations, to detain me from the foulness of vice, have fancied to my self the presence of my dear and worthiest friends, before whom I should lose my head, rather than be vitious: yet herein I found that there was nought but moral honesty, and this was not to be vertuous for His sake Who must reward us at the last.
It's just that I'm afraid I may lose my head and do something rash.