Need some help

Ok it all started like this my car over heated at idle at a light. after i took off the temp gauge went down. So then i did a coolant flush and put new coolant in it and it went away. after about a week i kinda felt like the car wasnt getting fuel when i slowly gave it gas. I could feel the injectors not pumping but when i gave more they worked fine. After aboutacouple daysi stated the car one moring and some blue smoke came from under the hood and exhaust. After runing for a bit it went away and thats where im at now. kinda hard to tell what happend over the computer if someone wants to come take a look at the car they can.