Hi. My Husband Has Been Very Sick For Past Several

Hi. My husband has been very sick for past several days and has still somewhat functioned and pushed through but is now so bad he can only sleep and lay around. I am a registered nurse and the only reason i have not taken him to the hospital or doctor is bc he has no insurance right now. if I tell you his symptoms will you please help me figure this out and if i really should just take him to ER and what they could do to figure it out?? Im very worried. I just know with no insurance it will be a huge bill and we are broke being that neither one of us have been working for a couple months while looking for jobs.
He has been very nauseous, especially after he eats. He has been complaining of constant pain in his lower back that isn't like muscle pain for a while but worse over last week. His face gets somewhat pale, he has vomited two days in particular and coughed up a small amount of blood one day. Now he is complaining of side pain on both sides mostly on right. He complains of also feeling like his equilibreum is off and just doesn't feel well at all. Please advise. He has never had his gallbladder removed. His dad died of pancreatic cancer when he was a young adult around 30 and my husband says he has been hospitalized before for stomach issues but they did a endoscopy and found nothing.