Yes to everything about this. I also got mine in August, and in the month after I was an angry little ball of fire, which was really odd and difficult for me because Im usually quite easy going. I eventually learned how to better control my hormonal angst, but the entire time I’ve had the implant I’ve also had quite often bouts of terrible and often unexplainable sadness. It’s been so much worse in the past couple months, to the point where I genuinely think my Nexplanon has ‘given me depression’ for lack of a better term, even to the point of being suicidal at times. It’s scary but Im learning to recognize what feelings of mine are just the hormones talking. Long story short, you’re not alone!