I am a female age 50 my left knee has been hurting for the last couple of weeks, past two days knee has been swollen and severe pain, at night pain gets worse and is through out my entire leg, I ve tried ice and take ibuprophen for pain. Just last night I noticed a ball on my calve area about the size of a quarter. having a very hard time walking. I am diabetic and do have high blood pressure. I am not overweight and I try to keep active (walk 3-5 miles a day). Not sure if this is something I should go to urgent care to see what is going on. I do not have health insurance so they tend to make you feel like you are not worth the time to check out thouroghly. If I go is there any questions or test I should ask them to run on me.