Is there any hope this could be IB? Or AF? 😭

I’m on my 4th day of being late for AF. I actually think I ovulated later than glow predicted to be honest as I’ve had EWCM until about 5 days ago which is when my boobs started hurting feeling really heavy!

I’ve just started spotting really light pink and only when I wipe, frequent urination and my lower back has started hurting today I’m hoping it’s not the start of AF! Any thoughts?