Hi Candice!
Your English is much better than my very rusty French!

It sounds like your LO is saved but you did not manage to save your brushes in a way that you can easily use again. If that's true you'll have to create the brushes again and save them as a seperate file in PSE.
Here's how to save a new brush set in PSE3.
1- Click
Edit> Preset Manager and make sure that your Preset Type is set to Brushes.
2- Select the brushes that you want to save as a set. SHIFT+click starts a list just like in file explorer.
3- Click the
Save Set button.
4- Name your brush set file and pick a directory to save it in. If you save it in the default brush directory, PSE will automatically load your brush set each time it starts up.
Please let me know if that works for you or if you have more questions. Don't be afraid to tell me I'm answering the wrong question. I've done that for native English speakers.
HTH!