Your cat could possibly have a bad bladder infection. This happened to a dear cat I had some years ago and I didn't notice it right away. When I did I felt terrible, because this can be very painful. I took her to the vets immediately and soon she was feeling better, but I sure keptmy eyes open after that. The best thing to do is take your cat to the vet. It could be a bladder infection or some type of worm. Let the vet make the diagnosis so get your cat in ASAP.
It is possible that she is ovulating ("in heat")
That in itself should tell you this pill is very bad for you. Stop taking the diet pills and talk to your doctor.
bleeding from the rectum can indicate serious internal problems and should be seen to by a health professional
This residue that you are speaking of is most likely the mucus that keeps your rectum lubricated when you have a bowel movement. Having a little mucus drip onto your underwear is normal, but contact your doctor if the mucus turns bloody.
The "Bubble" is more of a mucus cocoon. These fish have special glands behind their gills about the size of 10-cent pieces, which produce mucus that they spread over their heads and bodies.
lubricate the stool and keep it nice and moist
The integumentary system includes your skin, and mucus that lines your stomach, intestines, and rectum.
Because you are a freak
No
...well, it was partially my fault...
You may have an infection or it is sore for some reason.
Only if absorbed through the mucus membranes such as conjunctiva, mouth, nasopharynx, vagina, colon, rectum, urethra, and bladder.