I'm not sure what you mean by "7th semester." If you're a first-year college student, USNA wants the grades from your first semester in college (usually August through Dec.). I would be surprised if those grades have been into USNA as an official transcript for 2 months given that, for most, exams occur in mid-to-late Dec. Then profs have to grade the exams and submit the grades. Once that is done for ALL your courses, the school has to submit the transcript to USNA.
That timeline often runs until mid-to-late January. Obviously, some schools may move more quickly or have exams earlier, etc.
Also, the nom from your Senator wasn't due to USNA until Jan. 31. Just b/c he notified you prior to that date doesn't mean he submitted his slate to USNA prior to Jan. 31. Once USNA gets the slate, it has to get all the paperwork in order, so to speak. That can take 2-3 weeks.
I would check the CIS portal to find out when the transcript was sent to USNA. If you don't have the info, your BGO should. If that transcript represents your final grades from the fall semester AND has been in for 2 months, AND you are qualified medically (no outstanding remedials/no waiver needed) and with CFA, and you don't hear for another full week, than, yes, I would contact your RD.
If any of the above hasn't occurred, one of those things is probably what's holding things up.