HELP ME PLEASE

My daughter will not stay asleep. Naps shes up half hour. 40 mins if I'm lucky and at night shes up every 2 hours of I can get her to stay asleep past 4o mins. Its exhausting and I'm about to rip my hair out. She wakes up every 2 hours to eat... she'll fall right back asleep afterwards but still soon as I put her down she's back up 2 hours later. She sleeps when I lay with her the longest but, I'm not going to do that every night. What can I do. She has bad eczema on her cheeks too which cause her to get up sometimes. Nothing helps there either. I'm exhausted. HELP PLEASE