Happens to everyone. Fun money is fun money and real money is real money. When playing with play money, you will never feel scared, but the same doesn't apply to real money.
Speaking of feeling, it is only natural for a gambler to feel nervous when he sees a series of losses and his funds may be depleted. But when we recover after a series of losses before the session ends, we will just sigh because it is not over yet. When that happens, I just try to calm myself down and I think I entered it because at first, I knew the possible consequences, accept whatever the outcome may be.