What could this mean..

So I just had my baby boy august. I got the ok for sex at the end of September but I waited til mid October. I am breastfeeding , so I know the chances of pregnancy are still there but I was not counting on it because it’s hard for me to conceive anyways. I chose not to use any contraceptives because I plan on having a fourth baby at some point in the next year or two. Definitely didn’t expect to get pregnant before baby boys first birthday but it wouldn’t be a big deal.

For the past two days when I wipe there is a very bit of light pink but a lot of clear cm. Is this implantation bleeding or could this just be something that comes with breastfeeding..

if it is implantation, when should I take a test ?

My period has not come yet.

I’m open to all opinions.