The Last Two Nights Ive Been Taking A Different Melatonin,

the last two nights ive been taking a different melatonin, its 2mg more but instead of it helping ill get really tired and once i try to sleep i cant sleep for usually two hours and i just sit there and i get angry over e v e r y little noise even if it's just my sister turning over ?? like i got so angry and frustrated i almost screamed and started pulling my hair out...thus making me more frustrated and when i finally asleep i wake up late at like 11