You arrive in your current location, in the year 1800. You have whatever is on you at the time, and a modern smartphone with an everlasting battery and access to the internet of today.
To keep to the spirit of the thing, assume that your location is relative to the Earth, so you don't wind up in the middle of space. If you'd wind up dangerously far above ground, or under the ground, or inside of a solid object, assume your location is conveniently adjusted to the nearest location with enough open space at ground/floor/roof/tree level.
Easy mode: You know in advance when this will happen, and have time to prepare.
Hard mode: It happens without warning, right about now-ish.
Medium mode: Same as hard mode, except the moment of transition is at the most convenient within the past or next 50 days. For example, you're on your way home from the nearest holiday feast, so if you wind up in the middle of the wilderness, you're not going to starve right away, and are wearing / carrying what you normally would while traveling today.
What happens next?