MY FORD FUSION IS SMOKING, STALLING AND ROUGH IDLING...WHAT IS THE ISSUE?

Greetings Scotty! Much respect to you: great content! Always Informative.

I have questions regarding my 2013 Ford Fusion Titanium and a Smoking Exhaust issue. So I did an oil change on my car last Saturday; went to handle business...finished my business and got back on the road...As I was driving down the street, my car started lightly vibrating; I then pulled off the street when safe and shuttle car off and waited a couple of minutes thinking that maybe the shaking would stop( now, also I did receive a P0087 Code which is common in most Ford Fusions regarding the Fuel Rail Pressure Sensor (LOW); restarted the car and began to drive again but this time yet again the vibration return but only more aggressive. Then I noticed white smoke expelling from the exhaust from the back of my car; then the RPMs went unstable; when I applied acceleration, once the RPMs raised to 2nd gear, the car felt as if it was stalling; then rough idle. This was totally abnormal...so I took it to the nearest Mechanic shop (Meineke)....they scanned my car and said that it was a Camshaft "bad" solienode issue...I returned the following Monday; picked up the car and headed home. It drove normal for 3 miles until I stopped at a traffic light. As the light turned green I travelled on until the car started stalling again; then rough idling; then the exhaust began to smoke profusely except this time it continued as I drove down the highway until I arrived home (this was a total of 2 hours)...since then I haven't moved the car (when I start the car; white smoke comes from the exhaust). My question is, How would you diagnose this situation???

I have a 2013 Ford Fusion TITANIUM AWD, Mileage: 147968.0mi., Automatic, P0087 Fuel Rail Pressure (Low)