Hey, I'm a new user and not sure whether I'm on the right subject here please forgive me.
I have had the implanon (2nd time) for about year. I never get a regular period and didn't the first time I had implanon. Instead I have a short light one every few months.
This month on 3rd August I started a painful period that lasted a week although very light and brown. I finished on the 10th Aug. Now on the 16th Aug I have started spotting, again with a lot of pain in my back. 
I am also very spotty with lumps in my armpits which I know can be put down to hormones but I never get this either.
I'm worried that this could be early stages of pregnancy as I've worried myself by reading a few threads on here where some ladies have got pg on implanon.
I'm worried as I'm 19 and due to start uni next month. Maybe I'm over thinking but any advice or reassurance would be greatly appreciated
Thank you 