The pain management is another issue. If it can be managed with standard pain killers like
Ibuprofen (and some women do
well with heating pads, too), then it is not an emergency. If you think you are very unwell, then yes, I would say push for an earlier appointment. Only you can decide how serious your body's signals are and what they are telling you.
Cysts seem to hurt worse when we know of their existence. You are also dealing with some post-miscarriage pain, I would think.