We can basically put villians on any two average+ hands. For ease of calculation, lets say they have perfectly random hands - we can adjust later.

There are 8 hearts left - 4 which really matter to you (JQKA). 47 cards.
Odds one oppenent having you torpedoed (higher flush) = 4/47*7/46 * 2= 2.6%
Odds of either: ~5% (19:1)


Odds of one opp having higher flush draw (~7 outs) ( = 4/47 * 2) = 17%
Odds of either: 31%.

Odds of a set (10 outs) ~ 9/47*2/46 = 0.8% - maybe double this since pairs are mostly limping and never folding.

Odds of a pocket (non set) ~ 5% - double to 10% (although you would think TT-AA raises) (basically drawing dead)

Odds of a board pair/two pair = 1 - 36/47*37/46 = 35% call it 20% since they are all low cards, and possibly folded pre-flopl

Bottom line: flush draw is about 7 times more likely than flopped flush, 10 times more likely than a set, and 1.5 times more likely than a pocket pair, and slightly less likely than a single pair matching the board. Floppped straight is about 3%, call it = flopped flush.

Now, one button flat called the flop, and BB raised it. That would indicate they have SOMETHING. High heart, straight, set, pair. I don't see AK no hearts continuing on this board.

So I make this as:
Flopped flush:Set:Higher flush draw:Pair/2 pair:straight
(roughly)
1.5:1:10:25:1.5
or
3:2:20:50:3
or
Hands that beat you: 4% (you have runner-runner sf outs for split+)
Hands that have outs (set/fd): 28% - you win here 62-75% of the time
Hand you crush (all others): 68%

So, you are ahead 96% of the time vs 1 opponent, but only 92% vs. both, and worst case (in which you are still ahead) 1 has AXh and the other has a set, given them 17 outs between them, twice. Odds of that are about 1/8 (12.5%)

After all that analyis... still not sure what to do. 1/3 of the deck is scare cards... that would seem to indicate a re-raise of some sort is in order. Also, your flop cold-call is going to look MIGHTY suspect.

I think I min/rerraise. A set will push over. A fast played flush (raiser has one) will push over, a slow-played flush (caller) will flat call again. The hard part will be distinguishing beween a non-nut flush that beats yours and a good draw/set. But most likely you are head and villains have outs, so you should kill their odds.