Wow, sounds like the same thing I went through.
I went through the same pressure type headaches almost "ice pick headaches". I was on mepron/zith (and artemesia) but it did not work for me After 5 mos I sought a different treatment (herbal) art, A-BAB, cryptolepsis and sawmento. It seems to be working but slow....I've been at this babesia treatment overall for 7 mos.
The head pressure I seemed to get over after about 1 1/2 mos of being on a treatment that worked --- so hence the herbs. That took awhile. When I saw I new LLMD he prescribed Wobynzm (sp?) for head pressure and inflammation (of which this is). This did not work for me but I did start taking tumeric which worked better for the headaches and inflammation all over my body. So maybe try either one... of course, detoxing is also the issue and an overloaded liver which tends to affect the head (dizzy and headaches also).
good luck