12 oz of home brewed coffee is fine. My doctor said to just not have more than that.
One cup is not that bad I have a glass or two a day, or I will have a small can of pop. Another thing to think about is switching to decaf tea. I did it there is no difference at all.
A small cup of coffee is fine. Avoid herbal teas since many herbs, including chamomile, aren't safe in pregnancy. Peppermint is fine.
Yes you can have up to 200 mg of caffeine a day. So 1 cup of coffee will not hurt.
You can have a max of 200mg of caffeine a day
Not at all. I've been drinking a cup of chamomile tea every night to help me sleep. And lemon tea when I'm sick.