Well, your king and rook are the two pieces defending f2. He is attacking it twice. Regardless of whether you should be panicking, moving either doesn't seem logical :-)
In general you needn't fear an exchange like Nxf2 Rxf2 Bxf2+ Kxf2. His two developed pieces are worth more than your rook and pawn. He's more likely to go for f7-f5 though.
I don't really know what I'd play as White, these KIA positions always look very static to me, I'd rather have Black.
Looking for a bit of help if that's ok. I started two recent games with the King's Indian Attack and both times opened myself up to the above. And twice I've been decimated.
In the first game I tried moving my rook over to e1 but the bishop smashed through while in the second game I moved my king over but suffered the same results.
Need I have panicked so much?