Regular blood testing every ~3 months or so is useful, but not absolutely mandatory, especially if not particularly affordable or feasible. Here are some sources of private blood testing if you cannot access it through the medical system:
(USA): https://www.privatemdlabs.com/
(USA): https://labsmd.com/
(USA): https://www.walkinlab.com/
(UK, Ireland): https://www.medichecks.com/
(Canada): https://bloodtestscanada.com/
(Sweden): https://werlabs.se/
(NL): https://www.bloedwaardentest.nl/
(NZ): https://www.pathlab.co.nz/patient-requested/
International sources for blood testing are unfortunately rare. You can try to find local private blood testing services or ask a doctor if they can provide you with the appropriate blood lab requisition forms.
Unfortunately, depending on your circumstances, you may be unable to find a way to get blood tests.
