How soon after miscarriage can you get pregnant again?

KY

So I had a miscarriage about 3 weeks ago. Bled for 3 days and felt back to normal afterwards... how long does it usually take to get a period afterwards? My husband and I started ttc immediately after but is it possible to be pregnant again already? Having severe heartburn, a little nausea ( most likely due to the heartburn) and low back pain. Never had heartburn this bad except when I was pregnant with my first child. But I don’t want to get my hopes up if it’s not possible. How soon after miscarriage can you become pregnant? Did anyone get pregnant again within a month of a miscarriage?