Celest,
After iui, no need strict bedrest, but we just play safe and rest more. AFter iui, usually can rest about 30 mins, if no one is using the room, then can get to rest for 1 hour. The full bladder thingy before iui, I heard of. Dunno which one is better, empty bladder or full. My gynae ask me to empty. But I heard some ladies go with almost full bladder as it claimed to get the cervix in a better position. I tried both methods but failed. Probably back then, HB's troops condition is no good, that's why failed. Keep a normal mentally ba, place too high hope, scared of disappointments, treat it normal, maybe got surprise for you.