Got a call from UCSD.

I got a call from UCSD today and they said I was accepted. Very exciting, however, I checked the myAdmission portal and it didn’t say anything. Is it safe to assume i am in?

Yes, you are in. Congratulations!
I think you will find this thread helpful:
http://talk.qa.collegeconfidential.com/university-california-san-diego/1748050-calling-campaign-2015-p1.html