Non-health related work issues

I don't know if an aversion to my boss's cologne could officially be considered a sensitivity to a smell, but I certainly couldn't stand catching wiffs of it yesterday. It's not that it made me nauseous, but I really wanted to avoid it at all costs. Nothing else has caught me like that just yet. Or maybe I'm subconsciously urged to avoid him since he's the only one at work that doesn't know yet. I'm confident in my decision to wait until after my first midwife appointment when I'll be 8 weeks along; it just so happens that will be when he returns from his vacation and might be in a happy and receptive mood to me giving my 9 month's notice. I'm sure it'll go over fine, but I can't help but fear the potential bomb I'm dropping.