Do you constantly feeling guilty as a full time working mother?

I do :( Esp now that he is starting on solids, I am very nervous that my parents will resort to biscuits and snacks just to stop him from crying or whining. Also, I want to be there for all his firsts and scares that one of his firsts may be the time when I am at work. But realistically, Singapore is such an expensive city to live in and the cost to bring up a child is not cheap. It's either work and be able to provide for your children or don't work and struggle to give the necessaries your children needs to survive in this harsh world.