Lead with this straight draw?

[WorldBeater]

It's a 10/25 NL game and I have about 3k in chips. There are 3 limpers and I check in the BB with KhJs. The flop is QsTh3c. I lead at the pot for 100.00. EP folds. MP player calls (has 2k in chips). LP player has 1600 in chips) makes it 550.

I had not been in the game long. The raiser had been in a lot of pots and seemed aggressive during the time I had been playing. I considered pushing with my open ended straight draw / overcard.

1. Does anyone like / dislike the play of leading the flop?
2. Since I did lead the flop, how do I respond to the raise from the LP player? I don't have much of a read on him, although he has been playing seemingly overly aggressive for the short time I have been playing in this game. I hadn't been there long enough to get a reliable read on the players.