I can't even tell you how much better this makes me feel! I totally felt like I was being crazy. I can't stop checking OPUS either, and i've gotten like 3 of those webinar emails in the last couple of weeks and had the SAME reaction! I feell like sending a message that says, "Dear Emory, please stop sending any and all communication's that aren't related to an admissions decision; I may have a heart attack, thanks." lol.
It definitely makes me feel better that someone else is considering submitting some additional applications at this point too. I've done most of mine but have 2 more I'm planning to submit this week (It's really just a matter of uploading my essays) and was freaking out that I'm doing them way too later (even though I'm still ahead of the deadline).
I've gone back and forth about a thousand times wondering if my application is strong enough-- I finally calmed down a few weeks ago when I had most of them submitted and convinced myself they were all fine and that my LoRS and SOP were strong, but now that I'm in the midst of the waiting period, I;m totally freaking out about whether or not I'm actually a competitive applicant. I've gotta take up a hobby to distract myself from checking my email incessantly. lol