Heart skipping??

So I am overweight, and was recently diagnosed with gestational diabetes at 7 months pregnant. They have always said that our little girl is doing great, but just want to check her more closely. I started seeing a high risk specialist recently and she wanted to see me next week because she thought she saw a skip in a heartbeat. And she did, I saw it too while I was there. She asked me if I had drink any caffeine lately, and of course I had drink water all day right up until my doctor's appointment, which right before I had had a big glass of tea. She said cut out the caffeine and see her again next week. She said it's common and it usually goes away totally by itself, not to worry. Anyone else have this problem?