Hello
All these symptoms mentioned by you are not suggestive of any disease , rather a disorder as .
High blood pressure 160/105 mm of Hg , this type of B P may be due to excitement ,
anxiety , tension, sudden exertion ( as you mentioned that B P comes down to normal other time 120/ 70 mm of Hg).
I would like to advise that please get in E K G and echo for any cardiac involvement.
As far as gas in stomach and blood type test in mouth , may be due to hyper acidity or over eating.
Try raising the head of your bed about 4 inches with block. It might also help to avoid drinking or eating 2 hours before you lie down. Avoid fried , spicy , greasy food , also avoid alcohol , drinks with caffeine in them.
Take some
antacid ,but in symptoms are sever then you may need drugs like
proton pump inhibitor like pantoprazole-D .
Still no relief consult a physician and get his opinion.
Good luck.