feeler bet gone wrong...u have top pair u feeler bet 1/2 pot because u have a9s someone calls behind u. the board is flushing it is perfectly acceptable for a flush draw to raise half your stack here without fear of making a bad move.....do u know ur dead or should u call the bet or should u fold???

all you have done here is shoot youself in the foot.
keep your bet sizing ULTRA consistent. with a feeler bet you are simply saying im post oak bluffing or i have a huge hand. so they might reraise u back with any draw top pair or over pair and ur still none the wiser and ur getting backwards dictated to. ie your slightly passive betting has put you on the backfoot and you did it yourself.... bet strong bluff or cbet with top pair good kicker or a super strong hand. theyll perceive your continual 2/3 pot betting as your only play. its unreadable.