Postpartum 7 months

After I had my son in the beginning of the summer I learned that I had H.pylori and ulcers. After taking all the meds from the doctor I went back and was told I have a bladder infection and he wants me to see my other doctor for a sonogram on my ovaries and further testing. I’m only 17 and I’m super scared because these symptoms run in my family and usually each are told to take a pain med and stick to it or eat healthy. I’m originally 134-138lbs. I am now 108.. any suggestions on what might actually be wrong with me and why I can’t eat? Sorry for the mom belly 🤷🏽‍♀️