What Do Severe Abdominal Cramps After Child Birth Indicate?

I just gave birth 3 days ago and came home. I took the tylenol perscribed to me and woke up 3hours later in a full sweat but shivering and cold. I ve only drunk a 16 oz bottle of water and ate a very small meal because I was exhausted. I don t have a thermometer but the thermostat in the house reads 76° and Im freezing, could I possibly have a fever and what do I need to do if so? I have severe cramps in my abdomen which the doctor said should be normal but they come in waves like contractions. My daughter was also born 4 weeks prematurely if that makes any difference. Im in pain but im about 35 minutes from the nearest hospital. I ve been up approximately 3 hours and none of my symptoms have subsided after taking my meds.