I got Nexplanon in late September, and I did not have my period for three months, then have had it twice a month since January. I also have been getting sharp pains in my arm the last couple of days, from my arm down to my hand. It almost feels like it is in my joints too. I don't have insurance, so i got it inserted at the health department. I have called multiple times since I do not feel this is normal, and they have not called back. Is this something that I need to see an another doctor for?