I think that you really do need a lawyer. Since you do not appear able to obtain one, the best thing you can do is file a Motion with the court before the next hearing date. If your husband has an attorney mail a copy of the motion to the attorney, if he is representing himself mail it to him.
Since you don't say what the next hearing is for, there's not much I can state in regards to what to put into the motion. At a minimum you will want to lay out facts in a numbered paragraph format with one fact per number. Sort of like:
1. I am not in the U.S.
2. I cannot enter the U.S. to appear in Court because my husband refuses to provide employment documents required for the processing of my visa.
3. ...... (whatever facts may be necessary)
If an Order has been entered (contempt order maybe?) you can ask the court to reconsider or vacate the prior order based upon the information provided. You should also attach copies any documentation that supports what you will be pleading and refer to each document in the paragraph in which it pertains.
I am not certain if this is a family court matter or an actual immigration matter - and that he is trying to prevent your re-entry, so I don't even know what direction to point you in to look up possible examples online for you.
You might want to do a search for "Virginia Motion to Vacate Order" or similar. I am attaching a link below to a relevant code section. Look at Paragraph D in the code as it may well apply in your case.
Please note that this response is based upon the limited information available in the question. In addition, it is not intended to create an attorney/client relationship and is offered only as general information and not as legal advice.