I have suffered from exactly as you are describing for years.
I do suffer from anxiety generally, but it is 100 times worse at night, I wake with palpitations and cold sweats and can't stop overthinking, for me its mainly about work related stuff.
Anyway, over the years I've been to the docs about this several times, and been prescribed various meds, the most successful was amitryptaline, which helped me sleep through the night and made me feel generally happier and less stressed during the day.
I have come off this due to pregnancy, and have been an absolute mess over the recent months. Work had become more stressful, plus the added stress about the baby (had a MC last year so am constantly paranoid). But I can't go back on the meds as they haven't been given the all clear for pregnancy.
So, I'm signed off work at the moment. The stress, tiredness etc were just overwhelming and I was concerned about the effect that could be having on the baby. I am about to start acupuncture on Friday as an alternative to the meds, so I'll update you with how that goes. Nhs won't refer for it, but my physio who I'm seeing for a pregnancy related issue does it.
So, basically what I'm saying is go and see you gp. They can will help. Good luck 