Glad things got sorted so quickly, Mrs E. Funny how different countries/clinics have different ways of doing things: in my hospital in Belgium they would never try to attack a (huge) polyp without GA: if they see one during a diagnostic hysteroscopy they schedule a "therapeutic" HSC under GA, while an egg collection is usually without GA.
I had to take a light OAC pill for 3 weeks after polyp removal to allow the lining to grow enough to cover the scar of the intervention (and no bath/sex as long as there still is some bleeding). But yes, after period I would have been able to start treatment. You will probably find (like I did) that your periods get much shorter and less abundant after polyp removal, so another plus (although of course I hope you do not get to "enjoy" this benefit often before you don't have a period for nearly a year).
Glad also that you have your decision to move straight to ICSI! Fingers crossed!
In my Belgian clinic I was checked out pretty well before starting treatment: could not have IUI without hysterosalpingography (did the foam one). It was during this test they saw my polyp for the first time, so referred me for hysteroscopy. As polyp was confirmed on hysteroscopy and foam-test was inconclusive I was booked straight for therapeutic HSC + laparoscopy (which resulted in me getting an all clear for IUI).