Hey I am newbie in FAANG stuff, I just got call from amazon that I have successfully completed all rounds and they discolsed compensation, so I resigned from my existing company and the notice period is of 3 months, now I got the mail that they will give me offer letter 3-4 days before joining, thats stressing me out, is it normal that they dont release offer letter and gives it 3 to 4 days before or should I ask them to give now only