I cannot use drugs

Im 24 and im starting to notice really heavily that I cannot do Nicotine, alcohol, thx oder even caffeine in ways that would be normal. Every substance I’ve used in the past has had the huge potential to become an addiction. I drank to much alcohol and at times in which I shouldn’t have. When my partner broke up with me I WANTED to drink. At times I’ve drank when I knew it wouldn’t be good when I was really stressed out on life. When I have weed on me. I smoke every single evening until it is empty. I can’t smoke just 2 or 3 cigarettes a day, I smoke 10 or more. Should I try to regulate any of those or try to or search for other things that can replace those ?