Maldevinine

What is the make/model of tractor?

Does your farm grow anything other then corn?

Have you read "The Crooked Letter" by Sean Willams? It features a pair of mirror twins as the protagonist/s

Also, there is a medical condition where your internal organs are mirrored. Have you been checked for it?

If you are skinny, you should be able to feel your heartbeat through your ribs. Normally it's on the left. If you can't find it would probably take an ultrasound or MRI to show up. As far as I know it has no effect on your life, unless you need surgery for something. Then the surgeon gets a surprise.

Hilariously, the underground workers in Australia's Olympic Dam mine are at a lower cancer risk then the surface infrastructure workers. Australian sun is that bad for skin cancer.

The beat should be strongest on the left hand side, directly between the sternum and the nipple. The pulmonary vein goes directly behind the sternum to join up with your other lung, so that might be what you are feeling.

It is of course possible, just very unlikely that your heart is actually on the other side.