Hi,
The three commonest causes of the mentioned problem of dizziness are anaemia in which the haemoglobin levels are low and this commonly happens post pregnancy and the treatment consists of hematinics which contain iron/folic acid. The dizziness can possibly be due labyrinthitis, in which there’s an inflammation of the inner ear structure which is responsible for maintaining balance. Thankfully, you don’t have an ear problem. The dizziness can also be due to low blood pressure and thus please ensure your blood pressure is okay and indeed if its on the lower side, one needs to consume more salt. Honestly speaking, it’s very difficult to make an online diagnosis and thus for the same please do consult a physician. I sincerely hope that helps. Take care.