1♣ was big, 3♦ was nat and GF, and my pass as opener was forcing (I had planned to come in with 4♥ over any "normal" action by partner, as I thought I was too good for 4♥ right away)
a ) What's your bid? (try not to result
b ) how are you playing 6♥ in the south or 6♦ in the north on the presumed spade lead, ♠Q in hearts, low ♠ in diamonds?
Hidden: RHO has 4 hearts, if you ever try to cash two top ones

Help

1♣-(2♠)-3♦-(3♠)
P-(P)-5♦-(P)
?