Trying to get pregnant!!

Hughes • mommy of 4
I just had a baby boy 2months ago an last night me an my husband decided to start trying for our second child. Everyone keeps tell us we are moving to fast to space them out 2 or 3 years. I feel as if they think we can't do it but really we can an we are trying for a little girl but I'll be just as happy with a boy again. What's yalls opinion we moving to fast or what? I was also told I couldn't get pregnant again until I started my period again is this true?