Hi, with being a distance or being in some rural areas it can add more pressure to 'when' but the easiest i have found if you are questioning should i go, then often it is a yes. (Us older people do this at times too)
Dehydration can be serious, should be addressed. Not being able to eat also pretty concerning. Seems to be easier to loose weight at times and tougher to gain it back. New, and continuing pain should be addressed.
Labs are a good indication for that time, situations can change with this without much notice. Being seen can be so helpful. Even if it ends up to be an all OK, at least your due diligence is followed through.
My thoughts and prayers to you and yours,
Be well, God bless