Ttc after miscarriage?

Nichole

I had a miscarriage 2 weeks ago. Started bleeding the 22nd, ended the 27th. Did labs last Wednesday and my levels were back below 5. My doctor said to wait a month before trying to conceive again but not really sure why? If my levels are back to where they should be shouldn't it be fine to try again right away? I've been reading mixed things so not really sure