Going back to work today

I'm in bed with my three month old baby snuggled up next to me. I've been spending every last minute I can with her. I go to back to work today. The last three months have been amazing. This has been the longest time I've taken off work since high school. I've learned the is more to life then work. I'm sad to be leaving my daughter. Luckily I'll have my mother to look after her. Not day care. We have been having a hard time with bottle feeding as she is EBF. I'm worried she will struggle with not taking a bottle. I'm feeling down. I don't want to leave her. I want to stay home and just spend time with my daughter. Watch her grow. I just feel as I'm going to miss something. Please let me get through this first day and everyone after today.