Oh mama, please don't be too hard on yourself, this is actually more common than you think and you are definitely not alone in feeling this way. My girl went through a similar phase when I went back to work, and I remember feeling so heartbroken every time she pushed me away. What helped us was being really consistent during the time I did have with her, like bath time or bedtime routine, so she slowly associated those special moments with me. Give it some time, toddlers this age are still figuring out their feelings, and your bond with her is stronger than you think!