Check battery cranking amp is same as before by using voltmeter from any battery shop, when car is switched off.
Get the spark plug check and get servicing done little early this time to see if it helps.
If it doesnt then i see starter motor is about to die.
horrible squeaking is what the problem is with my Taurus.
The thing is that i was back home for 7 months and when i flew back in the car would squeak every time i am driving.
What happened please help me