It could be in your head because you only took 0.25mg twice a week for 9 weeks, you basically took a total of 4.5 mg spread during 9 weeks, I highly doubt that low of a dose can have that many side effects, but it could be possible since finasteride is very strong even in low dosages but it should be reversible don't stress too much you will go back to normal again, eat healthy and live a normal life you will be fine!