Mania - What I do now when I feel 'too good'

In the past, when I had depression and came off some medication too quickly that I felt wasn't helping. I began to have a really elevated mood for a length of time. After a while (around a month later) I found my self slipping and not feeling as great. My mental health was declining and I couldn't handle it. I tried to do everything I could to keep myself in this elevated state of mind. However, after coming down I had big a crash and I was depressed for a while afterwards. I was back at the day hospital. I always now try to not let myself feel too good. Especially after having conversation with someone that had bi-polar who told me every time he feels very high, he always comes back down to depression, and that he himself tries not to let himself feel too good. While I do not have bi-polar disorder, and I was told my a mental health worker that I was having "mania". I still try to take the same logic, my psychiatrist also said something similar about crashing after feeling euphoria / mania.

Now while I distinguish there is also a difference between an active mind and mania. I recognise that when my thoughts are very active thinking about positive things, I'm also feeling very high. Given what has happened in the past, I try to to keep myself more relaxed, which I talk about below.

How I relax myself when I'm feeling too good:

Doing mindfulness meditations - leaves on a stream, meditations focusing on the breath or muscle relaxation ones.

Listening to relaxing music

Going on short mindful walks - making an effort to really try and be present and mindful of my surroundings.

Taking things a bit slower. Even talking slower can help my mind not go over the top.

Deep breathing exercises.

I know there are also mood-stabilizers for people that have bi-polar disorder. I have never taken them myself but it was suggested to me at one point to maybe go on one when I was unwell.