Hormones?

Currently in the last lap of my pregnancy at 31 weeks. Feeling crappy everyday due to back pain (sprained back was completely bed ridden for 3 days. Better now but still in pain) stomach cramps. Not able to sleep due to all the discomfort. Have been vomitting large amounts ( bowl fulls) daily since start of pregnancy till now. Vomitting blood on occasion as well. Have not left home except for gynae appt in the past month. Was hoping for hospital leave, but gynae did not grant it as baby is otherwise doing well. MC fully utilities too. And even so gynae gives 1 day for each time im admitted. Have been feeling emotional everyday, somehow worse at night, crying for no particular reason. Feeling unsure if I don't deserve HL because every mother goes through this discomfort and I should learn to suck it up? But I'm really really miserable. Bawled in clinic from the pent up Feeling of frustration and hopelessness, but gynae says she can write me a letter to take annual leave if i want. With regards to the symptoms - just need to endure as part of pregnancy. (For vomiting I have tried all medicines including maxalon, diclectin, ondansetron, dimenhydrinate at max doses but it doesn't work). Back pain taking panedine which works plus minus. Sigh what should I do?