Huge red flag in your post:
"I just had a baby in 2011."
Have you taked to your counselor about the possibility you have post-partum depression? Even if a hormone check says you're fine, you could still have PPD. PLEASE talk to the counselor AND your medical doctor and get a detailed work-up. Depression can manifest itself in anger, snippiness, etc., not just in "sad feelings."
I am amazed if this has not already come up. Your counselor should have already mentioned it. I would talk to your doctor (medical) immediately. Again, do not let hormone tests be the reason they brush off the possibility of PPD! It is not mere "baby blues" but a serious condition and can last a very long time after a baby is born.
This is likely not the only issue, since you have had issues since the wedding day, but it may be making things far, far worse than they need to be.
Did you and your husband (not an ex yet?) ever get any couples counseling? Could you do so now, assuming you want to save your marriage? It seems like an absolute must for you both, and you should continue with your individual counseling as well.
You had a baby in 2011 and have been separated a year -- so you've been separated for the entire time your baby has been around? Sounds like possibly the stresses of pregnancy and the huge fact of a new baby might have been big factors in your split. Have you explored that with the counselor? With your husband? Again -- you had issues before the baby, but how long were you married before the baby came along? If you had a short time together as husband and wife before you got pregnant -- that can be a big problem in some relationships and can scare off some men, too.
Please explore all this and if your counselor is not wanting to look at these issues, you might need to find another one. And be sure to consider joint counseling with your husband/ex even if you are not going to get back together -- so you can learn to be good parents of your child and to be on the same page about HER even if you cannot be married to each other.