I have nothing to go on other than my own opinion but I would say a good number of shidduchim come from friends and relatives who “get involved” as opposed to “official” shadchanim so you may want to try that if you haven’t yet. The second thing is to check your references. Yes, that means have someone call them. As bad as it sounds, its better that you know in case they need to be changed. (My own thing is not to give single friends as references simply because they’re in the same parsha.)
Hang in there 🙂
Lots of Hatzlacha! Looking forward to good news soon!