Work screwed me during leave

Jessica • Expecting baby #2 and enjoying our 3 year old ❤️
I asked my boss today about my return to work start date and was informed that they would only have Saturday's available to me(4hr shift) and maybe Wednesday's (another 4hr shift) currently and when I left I was working over 40 hrs a week, have been there for almost two years. I worked the 8-5 job at a doctors office. They acted like I had a disease and they had no idea when I would return and they hired two people to do my one job before I left. I am emotionally a mess. I have not even been gone 6 weeks yet and I worked up until I went into labor.