I missed a travel sale! Opinion/Advice!

[blueerica]

JetBlue just announced a fall sale. Awesome, except that three days ago I purchased my round-trip ticket at a price that's about $35-40 more than what they cost now. I know that the ticket purchases are non-refundable, but would it do me any good to call and see if I could get that lower price, and maybe a voucher toward another flight, since plan to use them at least a couple of times more this year, as well as an indefinite number of flights over the next year?

It wouldn't hurt to call, right?

I want your opinions and experiences with anything like this, if possible...

Thanks