Unprotected sex prior to commence period is almost safe period and there is no chance of pregnancy
is sub dermal contraceptive
method,used for 3 yrs and effective more than 99%.
It has some side effects & it varies from woman to woman like irregular period, headache,Wt change,DVT,abdominal discomfort,nausea,fatigue, mood swing
Do a USG lower abdomen & some hormone test to rule out underlying pathology if any.
Avoid stress,take healthy diet,control body wt by regular exercise,wear tight breast support and need proper sleep.
If you need further consultation with me,then you can visit http://www.healthcaremagic.com/doctors/dr-soumen-patra/63326.