Hi K.,
Seeing your doctor is a great first step. Just remember, don't do anything or take anything you aren't comfortable with. If your anxiety isn't severe, then often times it can be managed through stress reduction techniques or natural supplements as some of the other women here have mentioned.
That being said, I too am a stay at home mom. Even though my daughter is only a year old, I have been at home for the last 2.5 years. We moved to Germany for a time for my husbands work and I did not work while we were there. It was also there I became pregnant with our daughter and we decided that even when we came home, I would still stay home.
I too love it...but there is a certain amount of stress I felt not working. Silly, I know, but true. Since the age of 18 I had ALWAYS worked, and/or worked and went to school. I could always provide for myself. My job was sort of my safety net. When I was no longer working I didn't know what to do with myself! I had to work for a long time to realize that I am not any less of a person if I don't work. I had to realize that I didn't need a safety net of 'working'. My husband didn't look down on me, and even if something were to happen to him, we would still be ok.
That transition can be a difficult one. I don't know what else might be going on in your life, but often times anxiety is a symptom of feeling out of control.
In my opinion, I think you need to find ways to manage your anxiety, whether it is through relaxation techniques, self talk, supplements, of if you feel the need medication. But you also need to get the root cause of your anxiety. Medications and supplments and all that will only help alivieate the symptoms. If you do not address the REASON you are having anxiety, then you are only putting a bandaid on a much bigger problem.
It could be the transition to not working, or it could be something else. My sister is a psychologist and often times when I am trying to get to the root of some off the wall thoughts or feelings she will have me free associate. Find a quiet place and time, have your husband or someone else attend to your daughter, sit with a blank sheet of paper and pen and just start writing things down that pop into your head. Don't monitor or edit it, don't try to control what you're thinking... just write. Often times once you start all these other thoughts come rushing in that you didn't even know where there.
Seeking out a good counselor would be an excellent idea.
I hope you can find the problem. Anxiety is not fun.
Merry Christmas!