@nepalithito250 You should get it soon. As you said it has already gone past 90 days, you can also open a case inquiry here: (this might accelerate the process) https://egov.uscis.gov/e-reque... Also, by my own experience, sometimes these applications get delayed due to administrative lags by the case officer itself. To put in in perspective, i received my initial OPT after 150+ days couple of years back. I had to contact the area congressmen to inquire the process!! But in your case don't need to worry as its STEM extension as while your STEM application is pending you can continue working for 6 months even without approval.

My friend too . He got letter from uscis saying sorry for delay

chabahil and ajoshinp, Guys Mine is going to be 60 days and my opt start date should have been 16th and my opt is only for a year. I am scared that USCIS will not be too late. I hope I will get the full one year. It is stressing me out. what was your experience?

15-20 days up/down will not b issue in long run. Why r u stressed ? If this small thing stress u then think about applying greencard ; u will pee your pants . So just relax