unsure if i have an eating disorder

i’m not really sure if i have an eating disorder but i started to lose a lot of weight really quickly about over a year ago. i used to be a little overweight and was really insecure about my body. i began to smoke weed and which is why i think i started to lose weight, but now it’s more me choosing to not eat or not ever having an appetite. i’ll walk into my kitchen and never find anything appealing to eat so i just don’t. i usually eat if my mom makes me food, if i’m out with friends, or if i smoke weed. im 5’6”and used to weigh about 150 at the end of 2019, in over a month i went down to 132. then ultimately by summertime i weighed 113 at the lowest. i’ve just gained back about 5 pounds and it makes me really sad and not wanting to eat at all. like if i gain it back i’ll feel really insecure again.