Toddler can't nap

My 2 year old daughter can't nap during the day or she will not sleep at night at all. Today, she woke up at 5am because of some loud banging coming from next door and couldn't drift off again and off course she could barely keep her eyes open come midday so she had a half hour nap. I tried and tried to get her to continue her naps when she turned about 16 or so months but she wasn't having it so now she wakes around 8am and bed at half 7pm. Because she had a half hour sleep at midday today she won't sleep come bedtime even though she is tired and this always happens, even if she only naps for 15mins or so. She will stay up until 11.30pm or even later sitting up and down in bed or kicking the walls ect then she's tired again the next day and the cycle continues and I end up having to lift her and distract her when she starts to dose off just to get her back into the routine. Why does this happen? Surely 15 mins of napping shouldn't affect her bedtime?