am i doing something wrong when i cook beans? i keep getting sick

i’m 20 and have very limited cooking experience. i’m self taught, vegetarian, and i use beans a lot in my cooking to try and supplement protein in my diet. i just got back from college as well, so i haven’t cooked in a long time as i’ve been eating at the dining halls and don’t have a kitchen.

a couple weeks ago, i tried a recipe i found on instagram that involved cooking butter beans in a homemade peanut sauce. a couple of hours later, i became super, super sick. i vomited ten times in three hours, and i figured it was my fault because i must not have washed or cooked the beans thoroughly enough (i was heading out to work, and was trying to go quickly). today, i made another recipe with butter beans—this time including them in a thai coconut curry that i was making—and now i’m extremely sick again. i made sure to wash them thoroughly, dry them, and let them simmer in the curry for a long time. they didn’t seem hard or anything, so i assumed they were cooked all the way through. is there something i’m missing that keeps making me this sick? i don’t think i have an intolerance because i eat beans in other dishes without issue. this might just be me missing something really obvious, i learned how to cook mostly through youtube videos and barely know what im doing.