Hello,
Welcome to ehealthforum and thanks for writing
After coming off the implant chances of pregnancy are possible as the ovulation process starts and normal menstrual cycle resumes.It can take few months to a year and varies in every woman.
As you have explained that your periods were normalized so possibility of pregnancy is there and if you had unprotected intercourse pregnancy chances are higher.But it is difficult to comment without an examination.
If you suspect to be pregnant get a Blood hcg test done for pregnancy determination.Consider visiting a Gynaecologist for evaluation.Have healthy balanced diet and drink lots of water.Take rest and avoid stress.
Take care!