Sex after m/c

Lianna • Hubby & I have been married for a 1 1/2 year, we have a one year old sweet girl (Kinleigh) & a angel in heaven (Kamryn)
The dr said it was okay to have sex after m/c with protection until af shows then can try again, well this morning my husband was thinking and didn't pull out. I haven't started yet, but had m/c 3 weeks ago. Has anyone got pregnant that soon with a healthy pregnancy?