Medical checkups is anticipating problems with your health.   

Anticipating bad things is an aspect of fear which is negative faith.   

Fear is evidence of a lack of Trust in the Lord.   

Fear and mistrust is an open door to the attacks of the enemy.   

For the thing which I greatly feared is come upon me, and that which I was afraid of is come unto me. Job 3:25 Fear is negative Faith producing Evil fruit.

Stop Anticipating Bad Things and start Anticipating Good Things.   

A thousand shall fall at your side, and ten thousand at your right hand; but it shall not come near you. Psm 91:7 The thousand and the ten thousand represent those who attempt to live life apart from the Lord.     They will fall, but we who are In Christ will prevail.      Do not look at the statistics.     They are liars.     The Word Of The Lord is Truth Joh 17:17.      Believe the report of the One who loves you, who gave Himself for you, the One who is not only your Saviour but is also your healer and your comforter.