Hi Latemum, welcome to Fertility friends
As Linz advises, feel free to join us on the IUI'ers part 9 I think we are on now, there are many girls injecting now, I will add you to our positive vibes list on the first page.
One of our ladies has unfortunately experienced multiple miscarriages, I am sure she won't mind me mentioning it, she has just found out shes PG from IUI

so we have everything possible crossed for her and prayers that her little angel stays with her throughout the whole 9months.
My understanding is very hard to tell the reasons for miscarrying, I believe that the chances maybe increased a little with drugged cycles as with anything like this, but I also like to feel that as the best bits of DH's sperm is taken and that your follies are big enugh for mature eggs, that it sort of out weighs each other.
I have just had my insem on day 11 after 10 days of injections, I had to inject daily from 2nd day onwards, but then I took a much lower dose daily than you have and every clinic is different, I guess we all respond differently to the drugs, but I do have a 28day cycle
I am on menopur also, the dose was 150IUI which is 2 ampules for day 1-3 the 75 there after, my first scan is always day 7.
I can't promise there are no side effects as personally, I had headaches and was very bloated, but drinking water helped with the headaches... I was also very emotional or moody, but I thin this is more of what we go through emotionally than the drugs.
With regards to starting again some clinics like you to leave a cycle between like mine, some you just go straight away again.
I would like to wish you a succesful cycle and that your dreams come true at the end, so heres lots of babydust
Good luck and let us know how you get on
Candy x