Crying it out...or breaking my heart

Right now I am listening to Anna Kate cry it out for her morning/about to be afternoon nap. It breaks my heart into two to hear her cry. But as soon as I go in and pick her up and rock her, she stops and goes back to sleep. I went on Facebook a few weeks ago and asked fellow mom friends advice on how to help her learn to sleep better at night and during the day. All but two said to let her cry it out. I tried this three days ago and she cried on and off for 58 min. and then FINALLY fell asleep for 2 hours. But am I a bad mom? How terrible to let your child just cry for almost an hour straight...right? But instead of feeling bad, I tried the same thing a day later. This time for the morning nap...she cried for 35 min and then went to sleep for an hour. I thought...ok this is working. Well, I did the same thing for the afternoon nap and she cried for an hour and NO NAP!!! How long am I supposed to let this go on. I heard it should only take 3 days, but then some said it took a week to two weeks. I honestly can't do this for 2 weeks. I just don't think it is healthy. Well I am here again today, trying it again. She has been crying for almost 20 min and I don't think she is really calming down. She first cried for 15 and I went in and rocked her with a paci and she went to sleep on me. But as soon as I laid her down...wide awake and upset. So now I am not going to go in there and just see what happens. Well, I looked on the camera monitor...and little bit has pulled down the bumper. So I had to go in there. I went in and tried to not make eye contact and fix the bumper. It only made it worse. I then picked her up, rocked her to sleep again and then went and laid down with her in my bed and she is now asleep. I don't know what else to do. I will try the cry it out method for a few more days, but then I may let it go until she is 6months old. Ugh this is frustrating!!!