I have a virtual onsite interview scheduled on April 21st and 22nd. This is my first FAANG interview and I am really nervous about it. During my phone interview, I was so nervous that, I completely stuck with a relatively simple problem for 5/7 minutes. Eventually, I calm myself down and solved it. But I believe, that won't be the same for the onsite, since the problem complexity will raise a lot. 

How to overcome this situation? What should be my practice strategy for the next 4 weeks? Any specific suggestions for embedded SDE? 

Thanks in advance for the help.