Is my email hacked??

summer 71

O.G.
Aug 9, 2007
869
100
I received an email from a company that my order is shipped that I had placed a day before. The email contained the tracking number. Well I tracked it and everything was fine. Later in the evening I thought of checking the progress of the package and I was shocked that the email had disappeared. I checked the trash and also all the other folders but it is nowhere to be found.