It's not uncommon to leave these situations and feel worse for a while not better - which seems strange! But you run on adrenaline for so long, in fight mode and it takes a toll on your body and mind, and although your out of the situation physically, mentally it sounds like you havnt processed it all fully - understandable as it hasn't been very long in the grand scheme of things, especially if there is still issues in the background.
Have you considered counselling/CBT etc aswell as the medication? It might help and maybe explore the possibility of things like PTSD? Even if you can access face to face there are online options that might just keep you going a little bit?
Go easy on yourself, it's really not been long. Just put one foot in front of the other, you have a 100% success rate of getting through the day so far. You will get there.
For now, I have personally found apps like calm or other medication apps really really useful after a few days felt a little difference.
Join support forums, many out there, MIND are quite good.
Pull in any help you can at all. Even if it's for an hour.
Get out for some fresh air daily.
Speak to someone on the phone when you can, better still face time - no substitute for F2F but still positive.
Make sure your getting enough vitamin d
Try and eat one nice thing a day, whatever that may be.
Limit screen time, read (if you can concentrate and whilst LO in bed), play card games, do puzzles, garden, paint, draw, bake, decorate, DIY. Anything to keep your hands busy.
Make a list of things to do and do one each day.
It sounds abit idealistic but that's things really do help to chip away at the sinking feeling bit by bit.
If the medication doesn't feel like it's working then make sure you go back for review, sometimes doses need tweaking or a different one would suit you better. Also the GP can do bloods to check for things like aneamia or thyroid issues (if they havnt already) that may be contributing.