Hi babs04 and Lorekeet,
Anxiety and sleep issues seem to go hand in hand unfortunately. You are doing a brave thing by reaching out and sharing your struggle and know that you are in the right space to be listened to.
It's great that you have found that warm showers can help sooth you. While you are in the shower can you try to focus on the feeling of the warm water and sound of the water. Try to understand why it's soothing for you and then concentrate on that.
I can absolutely relate to anxiety interrupting sleep and I find that focusing on the present moment can help, when you find yourself waking up focus on the right here and now, and that is usually that you are in a safe place, in a warm bed. There is nothing you can do about the past and the future isn't happening yet so you are safe (hopefully) right now. Maybe you could also try some slow breathing, in for 3seconds, out for 3 seconds and repeat. Then increasing the breath length as your anxiety reduces.
Have you talked to your mum about how you are feeling? It sounds like she is a calming support to you. But we are here to listen whenever you feel up to sharing again.
If you are interested here is a resource from our website https://www.beyondblue.org.au/get-support/staying-well/sleeping-well
There is another thread on the forum 'sleep anxiety' which might be useful to have a look at.