What do all these acronyms mean??

Samantha • Mom to Greyson 👦🏼 💙 • Baby girl 🎀 due March 2019
Can someone please translate all of these acronyms people are using on here?? I feel so lost and am not sure what they stand for. Some of the ones I've seen so far are: AF, DPO, DH...can't think of any others.
I feel really silly asking but just want to make sure I understand. Thanks in advance!! 😊