Late AF or possible IB? TMI Pic!!

Kellie
Hi just wondering if there's a possibility that this could be implantation bleeding? This morning I got a heaps of sticky creamy yellow tinged cm then went to the toilet again and got this... It's pink and looks to have cm with it? Is it too late to be IB? 
I'm on cd40 and my last cycle was 33days so a little overdue. (I also have pcos and am on my first cycle of Metformin) thanks 😘