There are no rules for what you can and can’t be counseled about.
That being said, if you informed the E-4 that you had blocked her in the meeting with the SGT and the SGT had given you permission to block her to allow things to cool down, I do not see any problems for you. The fact that she may now be your supervisor again confuses me. Was the issue resolved? Did the SGT inform you that she was your supervisor again?
Bottom-line, I do not believe she can justify counseling you for blocking her. If she does counsel you, mark disagree on the counseling statement. Do not refuse to sign a counseling statement. Read Should I refuse to sign counseling statements I do not agree with? for details.
My recommendation would be to disagree and request a reasonable time-frame to respond to the counseling statement by writing, “I request 24 hours to properly prepare my response to this counseling.” If the leader refuses write, “My request was rejected by [Rank/Name] (Please see attached sheet).” You then attach a separate sheet with your comments. Be calm and professional.
Request a copy of the counseling statement. You are entitled to a copy.
Once the counseling session is completed and you have a copy of the counseling request, to see the 1SG/CDR on open door policy and present your case. Present the facts, be professional and unemotional. If there is something wrong I am confident your chain of command will address it. You may want to try and get copies of the text messages the E-3 was sending you or at least show your phone records documenting incoming text from her. Depending on the contents of the text they may be considered harassment.
Most leaders want to do what is right and when you request assistance from leaders who are not emotionally involved in the issue at hand you tend to get reasonable and rational solutions.