Absolutely - my 3 year old started with the night terrors around 18mths too, and was much the same as Maddison, screaming inconsolable etc. She still has them sometimes and i find that i actually have to wake her up fully to calm her down and then she drifts back off. Sometimes i have to stay in her room with her while she settles. During the day i would keep an eye on what she was doing so that when she has a nightmare i can usually recognise what she is associating with (ie something she watched or read etc) and can explain (as she got older) it is a dream, or pretend.