<human>: Could you distill the essence of the text into 1-3 sentences?

last night whilst out with friends (very drunk at the time) I found myself getting sucker punched by a couple guys in a club, as a trained fighter I understand the ramifications of me unleashing my shit. The moment I realised that there might be an issue I  made the decision to link my hands behind my back and to present myself as non threatening as well as preventing myself from making a bad decision. When it happened i stayed on my feet as I'm use to taking punches and how the body reacts, as well as these guys being totally untrained and rather pillowfisted. At this point a friend of mine jumps round me to start throwing punches back thinking it odd that I'm just soaking up punishment. I quickly grab him and let him know that I would rather press charges. Unfortunately the two punches landed flush on my nose, too drunk to dodge them, sober enough to not to lose my shit, inevitably I end up with blood coming from the nose adding to my current embarrassment.

here's the thing Reddit, after getting checked out and starting the ball rolling on pressing charges I just can't shift the massive dent in my pride. I am currently in a state of feeling completely ashamed and embarrassed with myself even though I know what I have done is the smart/right option I just feel like I have let myself down and with all the training and ability I have that I needlessly took a beating. Consciously choosing to lower my hands so there was no question on the CCTV  footage that I  had retaliated or provoked the situation, but in doing so losing a lot of pride and confidence in myself along the way. To be honest here I'm not 100% sure what I'm asking from reddit here other than a place to vent, and maybe some kind words of advice to cheer me up/get over the shame I feel.
<bot>: trained fighter got sucker punched by two guys in a bar, chose not to retaliate, but left feeling awfully ashamed and embarrassed. Help me out?