Vitamin D and
B12 levels like these are a common, treatable cause of exactly this kind of forgetfulness and poor sleep, so you don't need to jump to SLE or a neurological cause yet.
Next Steps
Get your
vitamin D and
B12 corrected under a doctor's guidance first, and track how much of this improves over the next couple of months.
Health Tips
A family history of SLE is worth mentioning to your doctor, but it isn't a diagnosis by itself. If new symptoms like joint pain or rashes appear, please get evaluated properly.