Nexplanon implant and lower back pain

I’ve had the implant for 2 years and it’s great that I haven’t had a pregnancy scare. However, my periods are so irregular it’s a joke. I keep track of my periods on an app called Flo and my cycle seems really abnormal. One month I’d be spotting for a week then my period would be over, the next month I’d either miss the whole month or I’d be bleeding on and off for 12 days or more, stop and be on again a week or 2 later, it’s never the same week every month. I can’t keep up with how irregular it is so I’m thinking to change contraception.

Positives of the Nexplexon implant is it is a very effective contraceptive and the insertion was quick and painless. However, I have been constantly bleeding (spotting and heavier bleeding) since I had it inserted 6 months ago. I have had bad cramping and lower back pain along side the bleeding. My overall mood has been effected as I feel exhausted most of the time, although I do work some night shifts so this may be a contributing factor. My sex drive has been lower than normal. I have noticed my boobs ache and feel sore. I am considering having it removed, if the bleeding does not settle.

For two years I had good and bad experiences with the Implant. I would definitely say the negative side effects definitely fall under mental health (depression and mood swings), sometimes I would get nausea to the point of wanting to vomit everywhere, migraines, lower back pain. My libido is below low levels. I think I lost myself over this 2 years, I don't feel like the same person mentally. However, this is the best contraception in terms of insertion and daily practicality. I wanted to start having contraception but I didn't want the pill (because I am very forgetful), I didn't want the diaphragm (too complicated) but this one was just perfect and painless procedure. Also, my body changed a little bit over the years but it was because I started being careless with my eating habits, so it is easy for your weight to change with the implant. And in terms of hair and skin, for me it didn't change much, I would get a pimple every now and then but it would go away by itself. If it wasn't for the mental health for sure I wouldn't take it out.