Take a deep breath and let it out!
I would advise you to meet up with your instructor and have them tell you what you need to improve on. I find that most clinical instructors are not being malicious when critiquing but rather they want you to start thinking critically, piece things together and understand whats going on.
I hate to break it to you but nursing school
= no time for anything. I have class/clinical/skills Monday-Thursday and then I have Friday to study and Sat and Sun I work. No fun until semester breaks but its a small price to pay to do what I love.
I wish you the best and remember it's hard because you are essentially holding the lives of others in your hands you can either help them heal or push them towards the other side.