Hi there. Not to worry being hungry at random times is normal. I asked my Dr bc I felt the same. She told me it was because "the babies metabolism runs on a 24hr clock and doesn't slow at night like ours does" anyway try eating small snacks like yogurt, oatmeal, granola or cereal, don't get too full tho that may also give u a tummy ache.
It's fine. You will find your self eating smaller meals far more often. If I wake up hungry, I grab some fruit and yogurt or a bowl of cereal.