How long can IB last for. Im 9dpo af isn't due until next weekend but Iv had on and off pink spotting for about 4 days now. Its only alittle bit and I only noticed it when checking CM... Ihad ib with my first but I cant remember how long it lasted :/ iv also had yellow tinged snot like cm since 2dpo and backache for about 4 days also :/ not like painfull more like a dull ache and very annoying. Had a horrible headache last night that lasted 5 hours not sure if its all connected or im just hoping lol Thanks