I Have Been Experiencing Pain In Lower Left Quadrant Under

i have been experiencing pain in lower left quadrant under my rib cage. I had an xray and it didn't show any signs of fractured ribs. I also had an ultrasound several months ago which came back negative. however the pain is getting worse. its difficult to bend over sometimes and if I am on my feet a lot it aggrevates it more. I have been diagnosed with lupus. my red blood count is high. I have an appointment with my hematologist this week. I have missed several appointments due to work commitments. I think its my spleen. what do you think?