This is a pretty ugly spot. 

I don’t think it would be viable to 3 bet fold situation, the stacks are just too awkward for it. The 3 bet would have to be on the larger size given the number of players in the hand say 38.5K-44K which basically means you are pot committed to call off if anyone 4bet jams on you. If you get flatted the effective stacks are going to be less than a pot size bet – which is going to end up a game of chicken. So I think the only real 3 bet option is to squeeze shove. I have done my best to replicate this in HRC with the slightly limited info you provided and with basic ICM calc. It actually says that 3 bet shoving TT in this spot is very slightly -eV. The best play seems to be to call in position and take a flop. 

However, you have said who was in the blinds and what their stacks are as this will have an influence on the decision. Also are you 6 or 7 handed? I have assumed 7 and put the blinds at 16bb and 20bbs for the above calculation. 

the current summary is

Fold – -eV play

Shove – v slightly -eV 

Call – slightly +eV play (however the calculation assumes the hands get checked down post flop) 

Like I said at the beginning its an ugly spot with no clear course of action. Which is why you are here asking lol. I hope this at least clarifies the fact that it is a tough and marginal spot and that whatever you chose to do was neither right nor wrong. 

What would I have done? 

Given that there is ~40k in the middle already and we cover 2 of the other stacks, I would probably have squeeze shoved. Although, table dynamics and who is in the blinds and with what stacks would come into the decision as well. You are i the bottom half of the leaderboard and will need to chip up at some point (although 30bb you have time). I might have taken this as a gamble spot.