Welcome to HCM
We understand your concerns
I went through your description. I sincerely suggest that the bulging of L5 has no significance to the tingling
or numb sensation you are experiencing. In fact you should understand body thoroughly to have any diagnosis. With the knowledge you have about your body is very much limited and therefore your diagnosis is ought to be funny. That is the reason why your doctor laughs at you.
If you are suspecting any damage to the nerve
which is responsible for the sensation of your leg, you should know, there are so many other symptoms which leads to tht diagnosis. For the time being, it is easy for you to believe your doctor and conclude that the numbness
is due to awkward position and doesnot happen often. Be busy with your job and be creative.
Hope this answers your doubts. Available for further clarifications.