Hi Hannah and welcome here,
Well done for the 18 days. What has helped me a lot with my recovery was checking in sober every day. It kept myself acountable and focussed.
Feel free to join in:
And if you are a bit like me you have hunger for information 
And this app is filled with it.
Use the magnifying glass above to find older interesting treads of every subject your interested in.
If you have any questions, feel free to ask!
See you around! 