"having the nexplanon put into my arm was virtually pain free. i did have the bruising and tenderness around the injection site. no symptoms for the first month. maybe a headache here and there. i have started bleeding though and it&#039;s been every day for 9 days now. it&#039;s not enough to be a full blown period but i have had painful cramping the first 5 days, more than with my normal period. i am optimistic tho and hope i will eventually have no period."