While I did not have your symptoms, I can commiserate with you on not knowing what's wrong, @nicosuave.

And, not knowing anything about your insurance or your sexual status, you can tell your internist that giardia *is infectious* to other humans and there is H2H transmission. So, if you are around a child or with a sexual partner, you can infect another human - no matter how clean you are.* So it can be considered infectious.

A giardia test should be a quick turn around(~3 days-ish).** Good luck and hope for the best for you.

*This is in no way a statement about cleanliness; teeny microscopic bits of infection are passed even with all our handwashing these days, as we all know.
**This from my personal giardia testing - potential infection from tainted water/food overseas.