Welcome to HCM.
The chances of pregnancy
is always there when you have unprotected sex.
As you are on implanon
, it is effective for period of 3 years so the chances of you being pregnant is less. During ovulation most of the women will have clear discharge.
I advice you to wait for week of missed period and perform urine pregnancy test to confirm whether you are pregnant or not. It is better to use early morning sample of urine for more efficacy.
Hope I have provided the information you needed.
Wish you good health.