I need Sleep!!!

After having Alana I swear I didn't sleep for the first 2 weeks. She had her days and nights mixed up and was feeding around the clock. Then she started getting more in a 2-3 hour feeding period and would start to sleep a bit more but there were a few weeks around weeks 6-8 that she was eating around the clock again. She would fall asleep and wake up an hour later and eat I felt like she was on me constantly eating. This was when we found out that I wasn't producing enough milk and I was doing everything to bring my supply up. In the end I had to put her on formula which help so much with sleep! She started to have 1 4-5 hour stretch and then 2 3 hour stretches after that. Now after I tried the cry it out 1 night she gives me such a hard time. Falling asleep now is not to bad most nights it is staying asleep that is hard. Last night was the worst. She fell asleep at 8pm and was up again at 8:30 then slept til 12:45am and ate 4oz and I tried to get her back to sleep she dozed off but would wake again after a few minutes. I lay in bed listening to her groan and moan to see if she would nod off but she didn't so I gave her another 2oz around 2am. She finally fell asleep but only for 2 hours. I tried to nurse her back to sleep this time and she did doze but again woke up I was falling asleep during all of this so I decided to just bring her to bed with me and nurse her to sleep.We finally fell asleep around 3 I guess I lost track of time. I just don't know this is exhausting to say the least and my hubby works at night so I am on my own. Being sick doesn't help either. Anyone else noticing this with their little ones?