birth control
"I had the nexplanon put in July 2014, after being on the combination birth control for almost 3 years.
I had terrible mood swings because of my body adapting to the synthetic hormones.The first 9 months I didn't get a period or any spotting. Then I started randomly spotting ALL of the time, with unbearable cramps, which only got worse after my 1 year mark. 
I am constantly bloated, and every time I eat anything I look pregnant. I eat very well, and workout almost 5 days a week. I'm 5'5 and 120 lbs. I can't say I've gained weight on the nexplanon, but I retain a lot of water especially around my stomach. I have an appt this month to get it taken out and be put back on the pill because of the spotting/cramps/bloating."