I don't think you're behind here. These are small stakes, bet out when you have it. The only card you're afraid of here is a 3 and that's really not likely for him to have and if he does have a 3, the only other card he might have is an A, but with his such tight %, I don't see that being in his range.

You're probably looking at TT+ AQ+ and just doing some EQ

Just doing his tight range you have 78% EQ. So checking is just there to trap. Could he have hit a set? Very possible, it's really a WA/WB situation here.