I have an 8 1/2 year old son and recently had a miscarriage

my question is have any of you had a miscarriage and started trying again right away not like right right away but about a month after

i have heard after a miscarriage you are more fertile than normal

i was barely pregnant my hcg level was really low to begin with so I had a feeling that this pregnancy was not normal

but the sad part was I miscarried while we where in las vegas for my fiancee's birthday and I did not even tell him until we got back and I went to the hospital ( I did not want to ruin his b-day)

i have talked to a few friends who say they stated to have sex when the doc gave clearance which is 2 weeks after miscarriage.

I never thought I could have anymore kids and then I got pregnant now I guess all the birth control is out of my system