Have the nexplanon implant for over a year and suddenly, i am tired all the time, cramping, bloating, headache and weeing constantly probably every hr?

Not nexplanon: the nexplanon will not affect your urinary habits, whether it has been a year or a day. Urinary tract infections can cause fatigue, fever, stomach pain, nausea, frequent urination. You need to have your urine checked, and possibly labwork to rule out a deficiency that is making you tired. Also important i is how long you have had symptoms. Dr. appointment good idea.