Hi Janette, did you stop the medication recently enough or quickly enough to be experiencing some withdrawal symptoms? Depending on the medication some withdrawal periods needn't start immediately and can stretch out. If it's a possibility maybe check with your doctor?
Otherwise maybe the stress, strain, distress of everything catching up on you? Sometimes we can keep some defenses up when we're in a stressful situation but once we know we can really let go, things we've held in may hit us.
Perhaps it's worth considering restarting the medication though? It needn't necessarily be a longer term thing either, maybe just to see you through this period of readjustment. I'm guessing a lot of things have been changing for you both practically and emotionally relatively recently.
And perhaps talking to either others with similar experiences as you had with your husband (support groups/online forums?) or a therapist?? Because "controlling" can equate to just the same as abusive and obviously an abusive relationship can have big effects on someone in it/on you.
BUT really well done on getting out of the marriage, that must have taken a lot of strength and courage!! Now maybe slowly you can move more towards really enjoying time with your children and the freedom to be more of yourself. It can take time to recover from experiences like you've gone through but with the right help and support...........
Alison