Overwhelmed or depressed

How would I tell the difference!

I haven't felt like myself lately and this move(from Georgia to Kansas) is just making me sadder each day I haven't really felt happy since we found out we had 3 weeks to move and I get so sad when my husband isn't sitting next to me, I don't really feel connected and happy with this pregnancy either, I can hardly handle my almost 2yo who is acting up so bad (I feel he knows something big is going on and doesn't know how to handle it). We still don't have a house to live in in Kansas although my father in law is getting close to finding one (we will be living with them, due to my health problems we can't afford to live on our own right now), we originally said we needed one with a finished basement with a full bath and either a wet bar or an actual 2nd kitchen so that way we each have our own living space but now me and my husband will be sharing the upstairs since the one they are putting an offer in doesn't have a finished basement.