Post partum discharge ?

So I had a c section a little over 3 weeks ago (1/27). I know bleeding is normal after , but up until now it’s been just normal thin blood, very light red/pink... and no clots or pieces. I stopped bleeding a day or so ago. But today this was on my pantiliner... should I be worried?? The color looks like old blood but like almost grey? Sorry for the pic but idk where else to ask