Would I benefit from 3+1 IM Ketamine sessions for fibro and GAD/OCD?

I have fibromyalgia, myofascial pain syndrome, GAD/OCD (health anxiety) and ADHD. So, my pain clinic offers IM ketamine, my doctor suggested we do 3 sessions one week apart, take one month break and do a 4th session as a booster. The dose would be 0.7 mg/kg for 1st session and then if I tolerate it well, 1 mg/kg for following sessions. All the ketamine sessions would be on a friday afternoon, with eye mask and music. I also recently started online sessions with a somatic experiencing therapist so I would also have sessions with her either the next day (saturdays) or on third day (mondays). I read most people get much more sessions to benefit from ketamine, so my main question is, is it worth it to do these 4 sessions as such? The treatment is super expensive so I don't think I can afford more sessions. - Thanks!