"i&#039;ve been on nexplanon for about 9 months now and at first i was happy because i didn&#039;t have to worry about getting my period, which is weird because most of the reviews i&#039;ve read said women experienced bleeding for the first 6 months. going into my tenth month however i&#039;ve noticed some spotting and have been experiencing breast pain mostly my nipples have felt sore and sensitive. also my mood swings have been out of control! i feel so bad for my boyfriend for putting up with them. i get so annoyed and irritated easily. as far as the weight gain, sad but true i have gained about 10 pounds which i&#039;m not so happy about but rather be 10 pounds heavier than being pregnant."