Implanon is sub dermal contraceptive
method,used for 3 yrs and effective more than 99%. If it is bent and painful to arm,then need to remove it and insert new one.
It has some side effects & it varies with woman like irregular period with prolonged amenorrhoea, headache,wt change, ,DVT,abdominal discomfort,nausea,fatigue,mood swing
Do a blood test
for B-hcg to clear doubt about pregnancy
. Need to do some investigation like USG lower abdomen,thyroid profile,LH/FSH to rule out underlying pathology if any.
Avoid stress,take healthy diet,control body wt and proper sleep.Do periodic health checkup to your doctor.