In the few weeks after donating, I did have some weird symptoms that had to do with regulating body temperature (mostly being way too hot ... when I'm the type of person who is always cold), dry skin, allergy-like symptoms to cats (I haven't had those in over 10 years of living with a cat) and weight loss. I was due for my period to start on the day of surgery. I'm guessing stress and the surgery did something because it only started several days later, once I was back home. I'd say it took a bit over two months for everything to go back to normal.