TTC!!! Help, Tips & All

Liz
We've decided we are ready for #2 
 First of let me start with this, we have a 12 yr old daughter. We've never really tried having a second child. Until now. I am 28 yrs old and he is 33 . We are ready!!! Where do I start ? How do I start? My periods are very irregular BUT these last months have been very regular. I just feel it I'm ready for a baby now. I just don't know how to start? Help please???