Advice on weird cycle?

So my last period was quite short and light, not to mention early (by 4-5 days), the third day was only spotting and the other days weren't even filling pads. No clots either, but I'm not sure exactly when I ovulated.

Since then my cervix has been high with LOTS of creamy cm but no PMS with the bleeding and no ovulation symptoms yet by CD15. But my boobs and nipples have been crazy sore, I'm super emotional like I use to get when I took birth control, on and off cramping, and more nausea (However I have stomach issues where I experience nausea on a fairly regular basis, but it doesn't normally get as bad as it has been)

Am I crazy to wonder if that light period might have been implantation?? I didn't really think too much of it until, while complaining about my boobs being sore, my sister said that's just how hers were when she was pregnant.

Do any of you ladies have similar stories and their result?

I know I should take a test to know for sure, I'm just looking to hear stories and advice from others who have been there! Thank you!