Is it normal to notice a small amount of white mucus on stool and tiny bit in toilet when constipated and strained abit to get stool out?

Mucus in stool could occur under that circumstance and isn't usually a sign of a serious problem unless it is copious. If you still have concerns, consult a proctologist or gastroenterologist.

It is not unusual to see a slight bit of mucus with the stool. If you notice an acute change in your bowel habits or any blood with them, you should see your doctor or a gastroenterologist. Good luck.