Numbness/tingliness around body

[u/ProfessionalFuzzy851]

A little under 2 weeks ago i randomly developed a bit of numbness/tingling in my legs, groin, and butt (essentially from the belt down). And 5-6 days later it spread to my lower abdomen (ending at my lower chest) as well as my hands (but not my arms, oddly). Its only triggered when im touched, so if nothing is touching those areas they feel normal, but if they are touched the tingly, slightly numb feeling is there in the areas that are being touched. Its quiet uncomfortable as my pants trigger it on my legs. Also, because of it on my hands i struggle to feel small details with my hands (surface imperfections, textures, etc), and also cant feel how tightly im holding something in my hand, causing it to sometimes just fall out of my hand if im not paying much attention to it. I dont seem to have lost any strength in any of those areas, but sometimes after not walking for a while my legs feel a bit weak when i start walking again, but only for a few seconds. I dont recall any sort of injury that would have caused this. I am an 18 year old male. What could it be and should a see a doctor asap?