in opinion only

it could be many different things. could be a wide range of medical problem affecting your emotions, (such as anemia, bacterial infections, viruses... and other medical problems that affect moods)

could be any number of psychological problems (such as bipolar disorder, schizophrenia, depression, anxiety disorders and others that also affect moods)that cause emotions to bloom out of control,

could be that you are becoming co conscious with your alters, if so this is a good thing. the mental health community here believe becoming co conscious is a part of the integration process.

it could also be that you are now in touch with your feelings, no longer shutting them down, stuffing them blocking your feelings out.

my suggestion since we cant tell you what this is and there such a wide variety of negatives and positives of what it could be, is that you contact treatment people (medical doctors, psychiatrists, therapists) in your area, tell them whats going on and they can tell you what this problem is by the process of elimination, and actual diagnostic tests.