IB question

Wow. Okay so this is probably nothing, I have been looking for anything this past week that might be a sign but this has me so excited I can hardly breathe. So 7 days DPO and BFN (I know it's really taking obsessively, don't ask…) but I wiped just now and got a bit of bright red blood. I am 37 and have never spotted before. AF isn't due for another week. My question is, can it be IB if it's bright and if in a CM check there is no sign of blood? I know only 20% of women get IB bleeding and this is our first month really trying so I think I am just reaching. Thoughts?