I'm just jittery all the time.
No wonder no one wants to hang out with me ;_;
I'll hang out with you for 250
On topic: I used to do kickboxing and sparred with training mates, the least experienced one of 'em being 3 years ahead of me...
Shit sucked ass, I always panicked not knowing what to do, especially after taking a blow or two in the guts, cause stomach shots always leave you breathless. After 20 or so spars I started ignoring the panic and just focusing on finding a mistake in their approach and making use of it.
Believe me, with time you'll get over it, there is no easy way to fix it.