Discharge is normal and is there to keep you healthy. It prevents infection, lubricates and makes it easy for sperm to reach your uterus when you are trying to have a baby. The amount of discharge can vary quite a bit during the cycle - around the middle of your cycle when you are ovulating, there will be more and it can be quite watery. Generally wearing a liner and changing it a few times during the day should be enough to help you feeling dry and fresh. However, the amount you describe does sound excessive and could indicate an infection. See your GP to get some swabs and perhaps some treatment if an infection looks likely.