Muscle spasms legs, feet and side back come and go, mild but noticeable. Had for 1 month. Is it MS, ALS will I get paralysed?

No. Someone has been reading too many medical horror stories. It is mega highly unlikely that spasms in an otherwise healthy 20 year old represent anything but overuse or electrolyte disturbance. The diseases you mention generally do not begin like that. See your family doc for an evaluation and reassurance of the correct diagnosis, so you can get this problem resolved.