‘I wanted to sleep. However, the night was too warm; I stayed up instead.’

That said, the adverb can also be used in the middle of a sentence, as in e.g.:

‘I will allow you to travel however you please.’

That adverb now means ‘in whatever manner’. Check out the link below to read more.

One comment though; avoid using too much comma. You don’t want the reader to feel breathless.

I might change it to “However, I decided not to, remembering that I was trying to overcome a fear and not make it worse.” but that’s up for debate. 🙂

right answer:

“However, I decided not to; remembering that I was trying to overcome a fear, not make it worse.”

there you go!