Your fears are so so normal, and I am not you and don't know you personally but I am not sure if you are actually 'depressed' or need medication. I felt all of these things when I was pg with my first (age 25, great starting career and solid salary, big city living, DH & I traveled etc) and suddenly having a child changed all of that. I had JUST got on my feet and began to experience LIFE and now I was going to be taking care of one????? UG! I'll tell you, I was terrified. On top of that I had some health problems and my job, too, was on the line so I feared that same thing: having to depend on my husband and suddenly go from successful career that I LOVED and worked through college for to now a dependent housewife and mommy?? AAAKK???
That was a tough pregnancy for me. I was terrrrrrrified. Off course, DH was just over the moon and excited. (go fig).
Honestly though, the SECOND I saw her and held her I could have cared less about everything else. Oh my gawwwwwd, I just loved my life and my world and we had just entered the war with Iraq and had bomb scares outside my building everyday but I didnt care bc I had her precious photo staring at me and had the most amazing, fun thing to zip home to on the train! In the end, I did leave that career when she turned 1.5 and I became a SAHM and I surprisingly LOVED it.
But like you, I missed my family so much and wished for her to be near that kind of dynamic so bad.
So my husband did make plans and we moved to my family in (the best place on earth) TEXAS. no income taxes, amazing home prices, good neighborhoods and schools and FRIENDLY people etc etc.
Life was just better.
I hope that you can see that this pregnancy is not a death sentence and that what youre feeling NOW is not nec' what you will always feel and where you live now may not be where you'll always live (and so on).
Everything changes, just like the seasons (your belly shows you everyday).
You never know that someday you guys will realize life might be better in texas or florida and DH will seek opportunities out there and you go. Or that you find other things that you love (career, goals, aspirations) parallel to being a parent & it doesnt mean you have to halt your life bc you have a child, but you can STILL be a good mom!