Pregnant in Japan

I just found out I’m pregnant 2 days into a 3 week trip in Japan. This was not planned or expected! I’m so distraught about all of the restrictions I’ve heard about - not being able to eat sushi OR go into hot tubs and saunas OR go snowboarding - everything I was planning to do here seems like it’s very very bad for a pregnant person to do!! I’m fine giving up alcohol but the sushi thing is such a struggle.

I keep googling, hoping to find the answers I want to hear - that spas are okay, sushi is okay, snowboarding is okay, etc. Please share with me your experience with doing these things while pregnant. I don’t want my trip to be ruined but I obviously don’t want to cause any long term damage to this baby. 🥺 it’s just a lot to wrap my head around.

I’m at 5 weeks today.

Edit: one more thing: what about cold plunging? The hotel I’m in now has an onsen with 3 baths - hot warm and freezing. Can I dip in and out of the warm and cold?? It feels so good 😫