thanks for your query.
Towards the fag end of IMplant use, the symptoms you describe are quite common.
There is no undue cause for worry.
However, the symptoms you describe, should be ruled out as far as a pregnancy
Please take a urine pregnancy test to be sure that you are not pregnant.
Also, mention the issue to your healthcare provider, as you have not been having periods, you could consider having a blood test
or an ultrasound
to ascertain a pregnancy.
Please see a gynecologist for the needful.