fledgling
Dear r144,
I don't know what you need (wish I could help), but it does seem that you need some kind of health professional, if only to reassure you. ..And sooner is always far better than later.
I've had the "flashing yellow stars" a few times. It seems to happen when I've been eating rich foods.
The numbing of arms when lying down could be put down to a tired matress (all mushed out). I fixed that once by adding a 1" foam mattress topper. But, as I say, I have no idea what might be causing your symptoms.
Of course you'd feel more prone to panic if odd things seem to be happening.
Eat lightly, drink your water, avoid stressful situations, and sleep well...and see a health care professional...today.
Good luck!
fledgling