All I did was put gas in the car the check engine light and the break light were blinking on and off when i started to drive it was acting crazy I pulled over the car and restarted it then it ran fine. Then when i got to where i needed to go the car started to smoke at me. I think that it could be oil eveywhere becasue the car leaks oil. I added oil a week ago then last week it was below the add line. So i think the oil is going somewhere in the car and I am not sure, could this be.

If the oil level is decreasing, the oil is obviously going somewhere. It may be leaking, or it may be burning via several paths. Keep watching the oil level closely and keep the sump filled unitl you find the problem.

As for the flashing light, it could be any nunber of things, and the easiest way to find out is to scan for error codes.