STYLETHREAD -- LET'S TALK SHOP!

Hey I don't know if this is wher I post this, but I have a dilemna and need advice!! Before my boss went on maternity leave I had some pretty weird hours because I would have to fill in for some people and pretty much be the go- to girl at my company for a fill in. Well when my boss left for maternity leave about 2 months ago I was given a permanent place and full time hours, finally a set schedule! However, my boss is now coming back to work next week and I saw my schedule and it is back to crazy fill in hours and not even full time!! I have 29 hours!! Give me a break!! I am so pissed I just want to say see ya!! I have worked here for a year and I feel like they think they can walk all over me. It is so frustrating!! I am going to talk to my boss on Monday, but I can't afford to work these shabby hours and I don't want the crazy schedule anymore!! Sorry I hope this makes sense I just had to vent!!