Dizzy/faint spells

Hi all,

The other night when I was just sitting watching tele I randomly went really lightheaded and dizzy, my head felt heavy and felt sick, I had this a few times a week after birth then it went away, but I’m worried as to what it can be.

I’m 14 weeks postpartum. Does anyone know what this could be? I’m drinking a lot, taking vitamins etc......

Also I had quite a traumatic birth which resulted in a big blood loss and being readmitted with postpartum sepsis so hoping this isn’t anything serious as only just on the mend 😴

Thanks!