It may feel like the carpet has been pulled from beneath your feet, but that feeling will only last a little while. Now is the time to focus on specific and productive goals and to pay some attention to you.
Do things that make you feel good and keep you well and healthy.
Posting here and writing about those feelings and your days, as you slowly get back on your feet may be the biggest support.
It is difficult to go through a break up when you can't openly discuss the dynamics of the relationship you are mourning.
And ditto on the "rebound" Dom. Depending on how you interprate BDSM into your life, you may feel you need to go find another Dom to help you keep focussed and to bring that structure and stability you have had and may crave. Don't do it.
Bring those things to yourself by setting small goals and taking care of at least one thing a day.
Playing is fine, but let those wounds heal on their own without using another Dominant as medicine for the heart.
Many hugs to you,
Val