is it too late?

Hey I have a question.

for about a month or so I've been eating around 1900-2000 cals a day. I weigh about 108-110 now. I was 100 lb before. I'm 5'5" btw.

Anyways, I don't want to continue to gain on 2000 cals. can I push it it to 2500 with out gaining like 10 lbs in 2 weeks? Is it too late for my metabolism?

And btw is night eating ok? Cuz I've been eating around 8-9:00 b/c I get home late. Oh! and I do 4 hrs of dance a week.

PLZ HELP!