My DD is 38 weeks and since she was 15 weeks has mostly been a good sleeper. However last night she screamed blue mutder and had to be to rocked to sleep, after becoming hysterical every time Ieft her room after comforting her. Today she was great, happy, playful, napped as normal, went down tonight in good spirits, and 15 mins later here we are again. I don't know what do. She isn't in pain, doesn't have a temperature, definitely isn't hungry and just stops when I pick her up. Will picking her up constantly start a bad habit that can't be broken? I don't know what to do. Lease help.