I think the auction strongly implies that partner has 5 hearts anyway? Not 4 spades, no more than 3 diamonds, unlikely to have 4 clubs. Might be 3=4=3=3 or maybe 3=4=2=4 and outside the 1NT range, but if playing 4cM/weak NT I'd probably double 2♥ as "extras" with that. Having seen the comments above I would still vote for 3♥ as the bid not implied by the hesitation