you could still have lymes, go to a neurologist that treats chronic lyme. I go to one now in fayetteville nc named richard serano for my chronic lyme symptoms-- he's wonderful
What the therapists are saying is that your memory loss is not as a consequence of any head injury.
You should see your doctor to check you out for any underling infections, blood tests with regard to the Lyme disease and referral to the appropriate departments for further investigation and prescribe you with any medications if this is needed.
Although mild memory loss can happen to anyone due to lack of sleep, anxiety, depression and so on, in your case as your memory loss is getting worse since your 8th grade and the fact that you had been diagnosed as having Lyme disease, you need help and further investigation.
Best wishes.
Sounds like chronic Lyme disease. This in one bacteria that doesn't want to leave. And of course you have to treat the co infections as well as Lyme disease. Check out the full documentary on youtube: Under Our Skin.