My night shift ended with a pt who had abdominal pain 10/10. Given dilaudid 6mg po fell alseep and woke at 0600 again with pain. No distention with bowel sounds rule out constipation. Has renal failure and liver transplant. Kept wanting to send out to er but pt was stable its a skilled facility we can keep pt stable.Anyway another pt began to desaturate with 102 temp. Started fluids with 100% o2 and tylenol. Both pt was stable except for pt c/o abdominal pain.Bickering know it all nurse comes in and begins to accuse me of nonesense and went to both pts and wanted to bag the desating pt. For some reason my rn supervisor switched his nonrebreather mask back to his venturi mask which he shouldnt since he was not doing well on it anyway. So nurse goes wack i put him back on the nonrebreather mask and goes back to 98.Next, pt with abdominal pain starts to cry. Ive literally tried what i could.Tums massage dilaudid and just wants to go to the er. Vital signs stable but for some reason bickering nurse starts to yell his bp is high! Student nurse checked it...i checked 150/68....i just said look ive charted we called the doctor got new orders waiting for doc of pt with abdominal pain to call back. I said im sick i need to go home it passed my shift bye. Was there seriously something wrong in my part? By the way im an lvn whos rn supervisor takes off at night and falls asleep somewhere where no one can find him!! All the time! So sometimes im stuck! Trying to keep pts stable!!