Welcome to the forum @Ehmeyer.
I will answer your question the best I can. Based on what I have seen over the last decade, my initial thoughts are no, it probably won’t help - especially at this point in his recovery timeline.
Keep in mind that my answer isn’t a hard fast rule. It’s just based on what I have personally witnessed in forums like this one. Statistically, I generally see considerably more men struggling with VR recoveries than otherwise. At this point in time, my guess is that a vasectomy reversal would probably lead to more headaches, but again, that is not some sort of one size fits all answer.
You never mentioned if your husband is experiencing pain, if he is stressed out, if he is sleeping well, and so on. In all honesty, we have very little information to work with here.
At this point, I’m not going to say a whole lot more. The last time a wife of a man posted something similar on this site, I responded with a long list of possibilities and it really upset someone. Needless to say, I won’t type you out a similar list, especially with little to none to work with here, but I will post this link for now.
Bottom line - my guess would be that your husband will likely get better over time. His testicles, plumbing, and body in general are going through some changes. Might want to look into the things that have been posted previously if your husband thinks they may have some merit.
That’s the best I got at this point in time. If you want to give us some more details - please do. If you have any more questions - don’t hesitate to ask.