Ovary burst?

Hi! I am 2 days late for my period and have no real menstruation symptoms that I typically have, but the tests I’ve taken are negative. I do keep having a burning sensation on my lower left side that comes and goes, but can be extremely painful at times. I also have had nausea, limited appetite, lower back pain, and headaches. I have a doctor appointment scheduled but they can’t see me until the end of the month. Do these symptoms sound like maybe an ovary issue or something more serious? I can’t afford an ER visit at the moment.