The hair sometimes appears to grow a milimetre or two when the hair sheds over the first couple of days, as the hair comes loose. However if it continues to grow any further the hair may have not reacted at all.
In regards to settings you may want to also have them lower the pulse, 20ms is not that good compared to other YAG’s like the GentleYAG that utilises 3ms (the lower the better). But yes, if your skin can take it try upping the joules, otherwise you may have to look for an electrologist or, if you still wish to pursue the laser route, try out a different one.
Regards,
Benji