Coventry aren't quite the highest-ranked club definitely through, but only not so on goal difference - Oxford, Fleetwood and Coventry are level on points. They do, however, have the best home record (only Wycombe have more points at home).
On the positive side, perhaps Ipswich won't fancy getting through because of the draw - they clearly aren't prioritising the FA Cup, and if they played their second team against us in the original tie, perhaps that means they will do the same in the replay.
And we can win at Coventry, of course we can.