Not trying to complain but...

I am so absolutely exhausted. I am 20 w pregnant and a CNA. Don’t get me wrong I absolutely LOVE my residents and before I was 4 months I was doing just fine with the hard work but now I’m just so worn out and scared for what could happen to me. I work in a SNF (skilled nursing facility) and often lift people much larger than I am. My feet swell all day and I only get 1 break a day. I don’t have time to stop and often get dehydrated. I am continually forced to MAKE residents get out of their beds while they attempt to hit/ kick etc me. I am also told to go into combative resident rooms. We only have 3 CNAs (sometimes even 2) on a hall of 38 residents. My nurse is not willing to help me and throws a bloody fit when she had to. I’m getting so angry everyday I go into work. I wish to quit so badly but I can’t. I regretfully accepted a 3000 bonus there and if I don’t make it to the end of September I must pay it all back, not to mention I can’t afford to quit until my SO comes home from fishing in Alaska. PLEASE HELP. I am so worn out and tired and angry. I feel so angry at the facility that I’m scared of acting rude towards my residents in my frustration. Please help