My baby cries so much when shes tired?

I know it's hard to hear your baby cry when they are so small. But, what worked for me and lots of other people is the cry it out method. As long as she is fed, diaper clean, and only crying because she is tired, why don't you lay her down and let her learn to comfort herself to sleep. It is very important for them to learn how to do this. If she starts to cry too long or hard you can go in every few minutes and rub her head or something to let her know you are still there. But only for a few moments, then walk out. She WILL go to sleep. It just may take longer than you want the first few times. Once she gets into the habit of comforting herself to sleep it will be SO easy. My daughter started sleeping through the night around 3 months, after I did this..