What could this be, could it be pid???

I went to the doctor yesterday due to having on wed and still having pain in my lower abdomen and under my belly on. I did not have any bleeding, fever, sickness. Ive been with my bf for 2 yeras and never had this before. My doctor took test and said it could be a cyst and even mentioned pid which scared me. I do not have any stds that I know. Im waiting for the urine and blood work to come back and have to still wait to get into the gyno this was a internal med doc. My question is, the pain has def gotten better although its there a little whn I walk and push on my stomach. If it was pid would I most likely have a fever? Also would the symptoms be subsiding withoiut any treatment for it? Pleae help me Im so scared! Also my period is due tomorrow its not cramping from that but if it comes on time would it also be unlikely pid since they cause irregular periods?