Confused

Sarah

So my cycle fluctuates from 28-32 days so quite hard to tell how, if at all, late I am! Glow tells me I am 1 day late, have taken 2 negative cheap tests and have only had extremely light spotting all afternoon. Usually when Period starts it's full on so the fact that there is only very light spotting is confusing me! Has anyone else experienced light spotting around when you are meant to get your period, but turn out your pregnant?