looking for advice

Kasi
So me and my fiancé are ttc and a couple months ago we thought I was pregnant but I wasn't. This month I started my period a couple of days ago but it's so much lighter than normal. And last week I spotted for 3 days and I NEVER spot between periods. I was just wondering what ya'lls opinion could be on that? On top of the spotting my breasts were super super sensitive and I was nauseated a couple of times.