Looking for some insight from any ladies that have experienced this. Im currently 11-12 dpo and I've never spotted before af is due. I had a miscarriage in June at 6 weeks and even then didn't have spots like this before bfp. Could this be IB? If so, how soon would I potentially get a bfp? Also, today I had a significant temp dip but SO woke up to pee an hour or so before the alarm so this may have caused it?

also here is my bbt chart

any input is greatly appreciated!