Since this is almost a month later, you're probably more in the swing of things now. But here's my perspective:
My first two years of nursing was AWFUL. I spent the entire time scared to death, and would go home every night (morning, actually) and stress about everything I'd missed, or could have done better, or didn't know. Patients would thank me for my care, and all I could think was "If only you knew everything I had WANTED to do for you this shift, you wouldn't be nearly so grateful with the little I was able to get to."
But as a seasoned nurse, I will say that yes, you WILL learn all the things you mentioned. As I mentioned earlier, it was a full 1 1/2 to two years before I was comfortable with my job and didn't feel like I was going to kill someone every shift. But eventually you find that you will get it. What helped me more than anything was teaching others - either new nurses or nursing students. That will really reinforce to you that you know more than you think you do.
Just a couple extra thoughts: nursing school cannot teach you even a fraction of what you need to know for your job, especially if you're going into med/surg. A good nursing instructor will impress upon you that the information you learn in nursing school is foundation only, and the majority of all your knowledge will be learned on the job.
Also, you will ALWAYS have days where you feel like you're running from one task to another (and unable to get to them all). The time you'd rather spend teaching a patient about their JP drain that they'll go home with is instead eaten up by having 3 diabetics and a patient with q 1 hour pain meds. But the longer you work, the fewer of these days that you'll have.
Hang in there!!!