Another phase in development
I can advise you only from my experience.
What your experiencing is normal. The problem is both psychological and betting when one is not yet comfortable with higher level of betting.
Psychological in that you do not appear to be yet comfortable. Also, scared money is always leads to poor decision making in how, overall, you approach the game.
First, you should not jump from 10 to 25 without a basis and only with a technical reason (based on the game and risk level presented)and not on greed basis.
Second, you should not attempt it if you do not have adequate bankroll.
You could approach it this way if it meets your taste. Play one session with the 5-10 chips. If you win or your cap becomes about 500, move to the 25 table for a separate and higher level session.
However, if you're mentally yet not feeling comfortable, your normal play could be affected. I know as I've been through that phase. The chips per se should be looked upon same as any denomination. Make sure that the bankroll is in accordance.
When I started to play 25 min. chips, I used to take a challenge by only taking 12 chips and try to make something out of it. There are times when that strategy works and you triple or quadruple your cap. However, other times I used to lose it all. But, then the question became, should I take another 12 chips and try again...
There is a lot of personal psychology associated with this game and it is a wide open situation. No two persons are alike in the psychology department for this game. The important factor is what makes one comfortable based on a good knowledge of the game, a realistic expectation in view of the limitations of the game and an uncanny ability to distinguish the very subtle line between satisfaction and greed or the inflated dream of making big money.
I hope the above helps. Season's greetings and good luck.