Interesting hand for discussion

[AceSquared]

Ok Ill set up the hand and see what you guys think.

Its 2$/4$ NL at the local B&M. I get dealt in the BB Ac Ah. Folded to MP who raises to 20$ (100$ish stack) folded to me and I smooth call ($350 stack). flop is Kh Qh Jh. I bet 45$ into the 42$ pot. He immediately goes all-in for his last 55$, AND flips over his cards showing me Qs Jc. (He thought I pushed or he made a mistake, unsure right now) So its 50$ to me and I KNOW im behind right now. What do you do? Ill post what I actually did later.