Patchy numbness in leg.

Hello i'm a 22 year old male, i've been having a lot of itching and spots of numbness on my leg, mostly left leg when i stand up or sit down(none when i'm laying down), i've had cervical mri done that came out clean (doctor recommend it since i had hyperreflexia and no other symptoms but he told me it's probably not MS when i asked him). I've also had a lot of stress and anxiety . I most probably have a herniated disc in my lower back according to my orthopedist but i didn't do an mri since after 2 weeks the pain went away (that was 2 years ago) Could anxiety be the cause of the patchy numbness or it is usually something more serious?