Hello, I'd like to help you with your question.
It sounds like you were reacting to the stress
you have been through in the past year. It is not uncommon to experience a time of intense emotions after going through a traumatic time in your life.
You have been there for your daughter while also coping with the loss of your relationship. There also are concerns for your daughter's well being since she has been expressing distress over staying with her mother. Although you have probably been coping well during these times. you may have been maintaining your emotions in order to provide stability for your daughter. Showing that you are emotional with your daughter when she needed your attention may have been too difficult. So you might have held this all in. When you went to see the counselor, it was a chance to let these feelings out with someone who would understand and who is neutral in the situation.
You may also have tapped into your need to have someone to share this stress with. You have suffered a loss. Anytime a relationship ends, even if you end it yourself, it is a loss. And you need time to work through your feelings about that loss. Going through a separation and child custody can often feel very lonely, even if you have a lot of support. These feelings might have accumulated and caught up to you when you were faced with expressing your emotions with the therapist.
What you are experiencing is nothing to be concerned about. If your emotions began to interfere with your ability to function in your daily life, then you might need to talk with someone. And talking to a therapist is always a good idea if you feel you need extra support. But otherwise, if you are able to cope well with your feelings and accept that you will need time to adjust, you should be just fine.
I hope this has helped you,