period talk...anyone have any input?

Brittanie ♎️ • Mother of 3. 💗💙💙
So my baby just turned 10 months, after 6 months my period started again like clock work, for 3 months. But now this month, I'm 10 days late. I already took a pregnancy test, and it was negative. Anyone else get their periods back and all of a sudden lose it again? I know it'll be wonky starting again, just wondering what everyone else's experiences were. Especially if you've had multiples, how your first pregnancy then period went. This is my first, so I don't have any experience getting back into the swing of monthly cycles.