can you get pregnant on the implant??

I got pregnant on the pill in 2014 and had a beautiful baby boy July of 2015
Other than me having the implant my boyfriend and I don't really practice "safe sex" if you get what I'm talking about. 
Last week I got sick to the smell of BBQ wings and I normally love them! Now today I have some weird pinkish/reddish discharge (I bleed when I first found out I was pregnant with my first baby) 
So I just wanna know if it is possible or I'm just having imaginary symptoms lol