Curious about IB

So we know it takes time for blood to travel. I see people posting about cramping and IB colors. If you had implantation cramping....would it take a little time for the blood to show or is it same day. I barely have any cramping today after 2 nights of them. I just used the bathroom and noticed very little brown in my panties and wiping..Gone after 1 wipe. AF is still 4 days away. I'm just wondering if it all happens together or would you have cramping before IB?