Hello, New atheist having a meltdown

[Deesse23]

I'm a 50-year-old woman who's spent her life making choices based on religion

Some people never realize they were duped. You did, and have plenty of time left to properly use.

There is no God to comfort me, guide me, protect me, or intervene in my life.

Well, as you just realized, there never was one. What you lost was the illusion of guidance. The decisions in your life were, most probably, already done by yourself. Remember how god always seems to agree with each individual believer? It is because everyone makes up his own version of god in his own mind. So either you already decided (unconsciously) for yourself or followed random events. Not that much of a change now: Lots of random (and beyond your control) stuff will influence your life, and you will decide the rest for yourself, just consciously this time.

There is no Heaven. I will never see my family, friends, or pets again once they/I die

Did you ever consider how boring praising a genocidal monster would have been after, say...... 1.000.000.000.000.000 years?
There is also no hell btw.
There being no afterlife only makes this life infinitely more valuable. Go out and look at the trees, and enjoy the view. Go hug your family, friends and pets, and feel how much more valuable your life is than it was when you were a believer.....and you dont even have to fear for your gay nephiew.

I feel devastated and terrified.

Thats what everybody feels after waking up from a nightmare. Remember: The future is bright for you, now that you know, its the past that was the nightmare!