How do i get my mom to stop thinking im suicidal?

i took 40 benadryl pills and she now thinks that i was trying to self destruct . i have told her that i wasnt , and she wont believe me, she then says "you subconciously were". she thinks im crazy for doing this but im NOT!!!! i just did it to see what it would feel like, i was bored and just did it at night time and thought it would wear off in the morning and nobody would notice, unfortunately, i was still intoxicated in the morning and afternoon the next day, she wanted to take me to the hospital. why does she think im suicidal