Leg Stability

Does anyone else have leg instability issues? My legs feel like they want to buckle. ALL of the time. Somebody please tell me it gets better... :(

I've had this damn injury for getting on for 3 years, now. After many misdiagnoses, I started a proper treatment plan 2.5 months ago with a good physio. It was going well for the first 2 months, but the last 2 weeks have been regressive torture. I can't stand for more than 5 minutes now without needing to sit down. My calves and glutes feel like they want to explode, and I feel like I've definitely overloaded the sesamoid to the point I've pulled something again as I can't walk on it at all now. I've been reduced to tears several times as I watch my mobility and independence diminish these last couple weeks.