What do you think?

Laika 💍 Son 👦🏻 is 3 & 🌈 👧🏻 is 4 months

Has anyone known to have spotting a day before AF was due and then heavy bleeding the day after with clots filling a pad and then the next day back to slight spotting again? Usually AF is heavy first two days and no spotting a day before... also have metal taste in mouth in mornings for days. Could this mean it is IB and I’m pregnant? When should I test?