You usually can't take money from your pension pot before you're 55.
There are some very rare cases when you can access your pension before 55, such as if you're seriously ill and cannot work as a result of this. You would need to speak directly with your pension provider to see whether this would be available to you as it would depend on their definition of 'ill health'.
You may also have the right under a pension scheme you joined before 6 April 2006 to take your pension before you’re 55. Ask your pension provider if you have a ‘protected pension age’.
The State Pension
The earliest you can take your State Pension is when you reach your State Pension age. If you retire before this age you'll have to wait to claim your State Pension.