Childless mother

This is my first week without my girls. They will be staying with their dad for the week of his rotation, after having them almost none stop for 2 years. It gives me more time but does a mother is suppose to have time for herself ? I feel weird and a bit lost. I guess once I get in hold with the rythme of being alone, I will go to the gym and movies and stuff. Already I'm eating with friends. They were always there, around me, on calls 24 hours a day 7 days a week. With no help whatsoever. No in-laws, no mother, no father or brothers no one. Actually, I've been raising them alone for almost 12 years. I absolutely adore being a mother. I don't care to have no time for myself. I love the absolute dedication that it demands. I think that more than the fact of having time or resting, they needed to be with their dad and their dad with them. I have to let go and let them enjoy. It's hard, i don't like it but i will have to get use to it. After all it is part of my decision.