This is definitely too much. You are a 19-year-old college student and to have your parents hovering in this way is far outside the norm. It isn’t what you need for your own growth and development. They are giving you the wrong message. Unless you have a very specific disability (even then I would question their over-protectiveness) you need to be given more and more freedom and responsibility, not under their protective watch. What we know from research is that this style of parenting typically makes for an insecurity, not a feeling of being protective.
Have a talk with them. Be blunt. They are not going to be around forever and you have to start learning how to take care of yourself. Explain you want both more freedom AND more responsibility to go with it. Come up with a plan and tell them what you need.
I understand there may be all kinds of reasons for parents to be overprotective. But the bottom line is the research is clear. This style doesn’t help in the long run and is only an extension of the parents’ fear. I applaud you for taking this first step in writing to us. Now it is time to talk with them directly about your needs.