How long until physical withdrawals 5’5 98 pounds skinny 16 years old I been eating everyday showers water just moving around not sluggish I mean I still got school can’t go to school a mess like hell nah but

How long until I start feeling a lot better I’m basically on day 4 it starts in a hour

Will it be quick for everything to Leave my body since I’m not full of weight tall lot of muscle etc? I’m on day 4 in 1 hour so hopefully I get better soon when do u guys think I will