You're definitely not going crazy. We have all experienced these kinds of crying jags. All anti-estrogen pills block estrogen and thus make us even more likely to experience these temporary emotional fluctuations. As far as having the flu, I wonder if being sick so soon after your cancer treatment makes it feel like this whole ordeal is endless, like you can't get back to being well. Just a thought. I know I felt that way when I developed illness and injuries right on the heels of treatment, and it made me realize how vulnerable I was and how much in my life had changed, and I also felt like it would never end which only added to my sense of losing control over my own body. If you have any of these feelings, please know they are very normal and they will lessen in intensity over time.
Hugs & prayers,