2 weeks after surgery, peeing a lot, fatigue, headaches, body aches,

I am nearing 73 and female. This is day 16 after laparoscopic gallbladder surgery. Had started to feel a bit stronger. Now, it's urinating very frequently, pronounced fatigue, ongoing nausea, ongoing headaches and body aches. So far no throwing up. How long does this syndrome last?

Alternative medicine: What is safest to take to relieve the body aches and headaches? Will it relieve nausea too?

I have Alka Seltzer on hand....although it isn't considered "alternative medicine," is it all right to take?

Many thanks.

Nina - wiped out