physical/mental shut down multiple times during the day

the title is the best way i can describe it after spending a long time trying to understand my patterns. you may have noticed that i have difficulty with memory that i have posted about on here before. can be in the middle of doing a task and i have this overwhelming need to stop and lie down. i can be trying to figure out some of my work and i cannot do anything more. it feels like i will pass out if i don’t stop. sometimes it leads me to lie down because i lose all strength in my body. at which point i may fall asleep or get very very anxious and my heart races and i feel like i start to have sensory overload. this happens multiple times during the day so i have had to start limiting the time i spend on my daily tasks. especially anything that somewhat requires a bit of mental and physical energy. do you have this??