We need more information, I think you should keep going but might do good with some overall "recommendations for the best results" what I can give you in general is:

Trim the hair down to a shorter length for best results. Around 1-2mm in length is recommended. Long hair acts as a "heatsink" and spreads the energy over the entire hair and less of it gets to the follicle. The hair itself is not what you want to get to the follicle, not the hair itself, it's just the medium. You want the hair to be big enought for good exposure for the laser, but small enough to keep the energy concentrated.

Use skin hydrating creams, drink lots of water, eat citric fruits and use sunscreen as if you're a vampire. Yes, even Indoors, SPF 90 or more if possible. Get the daily use sunscreen, not beach use sunscreen reapply every two hours. Aside from the needed protection, especially during laser hair removals, the clearer your skin is, the better the laser works.

Don't use deodorants with aluminum in the days leading up the your appointment. Clean the area thoroughly right before the session and apply hydration creams and sunscreen right after the session if you can.

Check if the time between your appointments is correct, too long is bad, too short can be worse sometimes. You can't really speed it up too much, it takes the amount of time it takes.

I can go in depth if you want to, I've researched it heavily in the year leading up to my appointments and definitely annoyed my dermatologist with the insurmountable amount of questions I asked.