Would you manage long distant international flights?

I am thinking about flying to China to try TCM treatments. Since my husband is the only one earning money, the whole family travel would be costly, so he suggested that I go alone, get a wheelchair service and a business class might work. But I am anxious about it, what if I had a crash on the way? I am uncertain if I am brave enough to go through a 15-hour flight, and then arrive at a new environment (I am not used to the place I grew up anymore ) and people I haven’t seen for a long long time.

How was your experience if you had any?