Hi I had my iui(1st) on 12th aug. On 20th aug, period started but period was very on and off(less bleeding, stopping/starting). My doctor told to continue progesterone and do the bhcg test on 28th. I did the test and it came out to be negative. I am still having periods bleeding (comparatively heavier now) and today is the 9th day. Could anyone let me know why I am having longer periods. My cycles are very much regular and generally for 5days. I understand IUI failed but first iui so was not expecting result. But concern about my periods coming earlier and staying longer.