You still stand a chance at that point, you just have to hope you get a quality hand to shove all in with soon after the break. Otherwise, you'll probably be forced all in by the blinds with a mediocre hand such as Q7.
i think you have a solid chance still. i wouldn't do an add on though since you owuldn't be gaining ground and still in a position of needing some luck. so don't waste your money on the add-on.
Absolutely. Your short stack can be very dangerous just after the break if you know how to play push fold poker. Wait for a big hand and get it all in.