Advice on troubling symptoms possibly related to liver or gallbladder?

[existnt]

Hi there!

In the last month or so I've been experiencing a significant amount of health problems and troubling symptoms and I'd really like some advice, opinions, or some insight of any kind. (warning that some of the symptoms might feel like TMI)

For reference, before reading the actual current health concern, just know that I am 18, female, healthy weight, not in the habit of drinking much alcohol, have Celiac's Disease, have deficiencies in ferritin,iron, and megnesium, have chronic (usually wet) cough due to asthma, have ehlers-danlos syndrome (hypermobility), and no other serious health problems.

A month ago I developed tonsillitis and was put on Erythromycin, 250mg 4 times a day for 10 days. The only reason I mention this is because the tonsillitis was when one of my main symptoms, loss of appetite, began, and because one of my other symptoms, steatorrhea (yellow, fatty stools that float) began.
The steatorrhea only lasted a couple days at the time, but in the last two weeks (over a week after I'd finished my antibiotics) it has returned. The strange thing is that I'm also having a lot of trouble with constipation, but whenever I do have a bowel movement (once every couple days), it is either steatorrhea, or they are very thin and paste-like and yellowish orange in colour.
Sorry for grossness.

The loss of appetite wasn't something I noticed very much at first, because I am on Vyvanse for ADHD so I am more than used to only remembering to eat once or twice a day. However, since I've been on the antibiotics, the loss of appetite has become increasingly worse and is now accompanied by mild to severe nausea. I don't think I've eaten more than 300 calories in a day for at least 2 and a half weeks. I can't. Either I feel so ill that I'm worried I'll throw up if I do, or the idea of food is just... generally unappealing, and if I eat a couple bites, I become full quickly and don't wish to eat any more as mild nausea once again sets in.

In the last week, I have also noticed pain in my upper right abdomen, which radiates into my side, and a little bit into my back, around the bottom/below my ribcage, around my waistline. The pain is intermittent, but when it comes it often stays for a few hours at least. It isn't severe. Just noticeably uncomfortable pain. Sort of dull aching and dull stabbing. I have had this pain before, but it only every happened in 5 minute bouts, once every couple months until this point. I also notice that my stomach makes a lot of noise in the evening/at night, and that I have been burping more often then usual, and have experienced mild heartburn at least once a day, regardless of whether I manage to eat or not.

I have of course also experienced weight loss, and have gone down around 10lbs in the last 3 weeks (ish). (I am now 116lbs with a BMI of 20.4)

Additionally, I have had feelings of malaise, and just feeling generally unwell, every single day. Fatigue, weakness, lightheadness,dizziness, and tremors in my hands and legs have all become daily (I assume from the lack of nutrition).

Done quite a bit of researching and everything seems to point to my gallbladder or liver. I do plan on going to the doctor as soon as I can get an appointment, but any advice offered would certainly ease my anxiety a bit. I just need to know what's wrong.

Anyway, thanks for reading and responding! I greatly appreciate it.