Menstruation
If you're using a hormonal IUD then yes, it can cause irregular bleeds. As hormonal birth control stops your menstrual cycles in order to stop ovulation it can stop menstruation, instead you can experience withdrawal bleeds and it is normal for these to be a little irregular.
The IUD will not cause abdominal tightness. The IUD is in the uterus, which is behind the pubic bone; it is not in the abdomen.
You can get trichomoniasis regardless of whether you have an IUD. The IUD does not cause or prevent trich.
An IUD removal will not cause hormonally-based hot flashes.
yes you can it dosent matter about that you will still become pregneat.
IUD can increase infection but it is from sexual activity introducing the bacteria not menstruation. You must seek a doctor's care if you have a pelvic infection.
Yes
Weight change will not affect the location of an IUD
yes
No, Paragard would not cause a nosebleed.
No, there is no connection between IUDs and the kidney. An IUD is placed in the uterus1, which has no pathway to the kidney.1. http://en.wikipedia.org/wiki/Iud