Little white bumps on nipples...

I have noticed over the past few days a lot of symptoms, most of which could be in my head so I'm not really counting on those - but I've also noticed these white bumps appearing on and around my nipples that I'm sure I didn't have before... my aereolas haven't gotten darker or anything, but I looked up these white bumps and apparently they're a sign of early pregnancy - although some other people say you can have them all the time, whether you're pregnant or not?

They are called Montgomery Tubercles I think - would like to know anyone else's experience... I'm pretty confident I never had them before, but then until we were ttc I never examined my body so carefully either!! I am on CD 31 I think, but don't want to test yet, as my cycle was a few days longer than this last month...

Thanks for any help x