Are you willing to chase it? When we enter a position, we need to plan for a range that is acceptable to us based on individual risk tolorance. No one can buy at bottom and sell at top. This basic fact simply means you have a high chance to end up under water for some time.
Therefore, it is completely normal to be underwater, as long as stock is within the range that is acceptable to you. Unfortunately, 90% of people believe they can buy at the bottom, and when stock drops below purcahse price, they start to panic.