Weird period

Amy • Tracking fertility as trying to fall pregnant. Been trying for 3 months now and obviously hasn`t happened.
I surprisingly got my period 2 days earlier then expected and I'm always regular to a tee, it was a shorter period as well which got me thinking - could it be implentation?
Since then (1 week) I have had slight neasua and my tastes have changed (definitely don't want certain foods I loved a few weeks ago). 
Should I test or keep TTC this month? 
Is this normal or should I be worried or excited?