Eh, no experience in the hormone part buuuut....
It's only normal to get nervous about life changing decisicions.
It's like our mind seems to think out all possibilities even the dumb ones at times.
When I was making my theoretic driver exam. my mind was like "Why not make a mistake on intend now?"
Good I didn't. I think it's called
L'appel du vide, translated
"Call of the void", look it up, most examples are about death but I think it's similiar
......
I'll stop my useless rambling for now