I started having them about 3 months out, then they stopped and then I had a few a month out. Take a little break from planning, that helped me a bit. Also stop wedding planning a couple hours before bed so it’s not on your mind
I've had a few wedding nightmares. One that sticks out is where my stepmother demanded that she wear a white wedding dress to my wedding and have a reenactment of her wedding during our wedding weekend.
Used to have them a bunch!! First started around the 5 month mark and then the last month before the wedding I was having more than 1 a week... It gets better after the wedding!! Try and write out all the things you NEED for a wedding like a marriage license and officiant!