She started to loose control of the counseling session earlier in the week and now has put in a application for an intervention order against me and included our son on it.
This is the real purpose behind her application, by including your son she's really trying to block your parenting. That simply cannot be allowed to go uncontested. I'm sure your solicitor or attorney knows that it is a top priority if not The Top Priority.
If this was a brand new case and none of the officials and experts were familiar with the case then you would likely face supervised visitation until some evaluations and assessments could be made and reported to court. (That happened to me and my county's CPS (Children's Protective Services) did a phone interview and then appeared in court to state their office had "no concerns" about me. It was all done rather quickly, at the first hearing, so I was never subjected to supervised visitation. Sadly, CPS was asked to investigate me and not "us", so they never ventured to voice an opinion of my newly separated stbEx who had a pending case in another court for threatening me.)
Since this case has been ongoing for a while you should be able to appear in court - perhaps not seeing your son until then unless the pending action states otherwise? - with various professional who can confidently state that there is no indication of any issue with you or your parenting.
Ignoring whether your documentation and testimonies may sway the court to view your favorably... . Be aware that court may still allow her an intervention order to keep you away
from her since they want to avoid risks of future incidents - and if that happens then you can step in and state you want a reciprocal order against her
so it applies equally to both of you, but you should get son excluded from the order and thus still get time with your child. If that happens then you will probably be unable to do exchanges at either of your homes but instead do it in neutral areas such as a police station, sheriff's office or similar location.
What may help your case is for your attorney to voice the policy of most courts, to handle
adult behaviors (between the parents) as separate from
parenting behaviors (the parenting and time with the children). As I mentioned above, my ex and I had various protection orders against each other in the first year or so of our separation/divorce but somehow I managed to keep our preschooler out of them. By doing so I was able to keep from looking like a bad father who was restricted from parenting or who needed supervision. On the other hand, they scrutinized me more and ignored her so for a long time her poor parenting behaviors were not addressed.