Nausea and coffee

I've never been a coffee drinker but pregnancy does some weird things to you! I've been battling this constant nausea for about a week and I've found the thing that works the best is a cup of coffee! I had one the other day just randomly because DH was having one and it settled my stomach for almost 24 hrs! I though it was a coincidence but last night I tried it again and it worked! It's a mild coffee and I only need one small cup and I can actually function through the day! So relieved!