Nexplanon emotions

So I was on the nexplanon years ago, and I had absolutely zero symptoms. I have two kids now and had it placed again after my second, so about 10 months ago and I have extreme weight gain which doesn’t bother me as much, but the last few weeks I have been extremely sensitive and emotional, and I hate that. I’m wondering if anyone else has experienced mood swings after having it for almost a year? I am at the top of the weight limit so wondering if pregnancy maybe a possibility too.