Implantation bleeding after period?

I’ve made a post before but got no answers so I’ll try again, hope somebody been through this. My husband and I are ttc, we had intercourse right before my period and right after. Well I had completely normal period, few days later I started seeing pink watery discharge when I wiped. Normally on the last day of my period blood is brownish and it’s done. Now it’s been 3 days since spotting and I’ve been feeling bloated for days now and this morning I got nauseous. I know it’s rare for IB to happen right after period, but is there anybody out there that was in the similar situation before? Any answer will be greatly appreciated