Has this happened before to you?

So had my period right on schedule- it was light. Red/brownish color and only like half a tampon every few hours which isn’t normal for me. Only lasted 2 days. I had light pink spotting on the 3rd day when I went to the bathroom only. Yesterday I had sore boobs & nausea. Today, I had sore boobs, nausea, cramps & I feel like my appetite has definitely increased. I don’t think I’m pregnant bc I take my pill religiously & I even got to the bathroom after my husband and I do the deed. Has anyone had symptoms AFTER period? I never have so I’m confused.