I don't feel pregnant anymore.

I am currently 18 weeks pregnant with baby number 2. Just over a week ago I could of swore I felt the baby move, flutters ect and I felt absolutely pregnant but fast forward to this week and I don't feel any movements, symptoms have gone and my bump looks like it has gone down. Please tell me I am not crazy and it is normal at this stage? With my daughter I had an anterior placenta so I didn't feel her till 20+ weeks. Anybody going through the same at 18 weeks?