Should I go to HR on my boss : )

            So, around four months ago my store got a new general manager. Every since then it has went down the drain whole. All of our crew including crew that have been there for ten years are quitting, so this leaves a bigger ratio of people that have only been there a couple weeks and are not fully trained. My district manager is asking why I am not making our service time goals. How can I? So my gm has been harassing me about firing me about every little thing. Service times the most. She sticks the very few old crew on her shift and gives me all new. So I let that slide because I am a strong person and do not need to talk back and loose my job. So her rant is that we have to be clocked out by a certain time every night. This includes our Friday and Saturday nights, so me along with eight crew members have been forced to work off the clock at least three days a week for almost 2 1/2 months now. I make a good amount of money an hour considering i am an assistant manager there, so I could only imagine how much money I could of made if I added up all this from 2 1/2 months. How many diapers I could be buying. I am afraid of going to human resources because I don't my district manager to think that I have went over his head. I've tried to talk with him and he tries to avoid conflict and just keeps telling me to try to stick it out. I want to go to human resources for more than just me though. She made a crew member come back the day after their dads funeral saying "You will be fired if you do not come in Sunday." How disrespectful and non understanding is that. She is also messing with my schedule as well, my position is suppose to include two opens one mid and two closes... She has me scheduled all closes and this really effects my school when i am there till 2 or 3 am then school at 8. The shift manager which is under me chooses her own schedule. Please help, I do not no what to do.