Hi
With the down regulation drugs experienced hot flushes, night sweats, headaches and heart palpitations, with the menopur I experienced quite a lot of bloating and felt quite uncomfortable (this was once the follicles started growing). Towards the end of using the nasal spray I had quite a sore nose inside. I put on a fair bit of weight (about a stone) once I started with the injections. I also had a lot of anxiety (when i went for the egg collection the nurse said this was because of the drugs, but was definitely very nervous and anxious - had previously put it down to part of the process etc...). For me the side effects were not half as bad as I feared and were nowhere near as bad (mood swing wise) as I had with Clomid.
Totally agree with Anabanana about lots of water helping.
Hope this helps and wishing you lots of luck
x