I'm trying to find the HN thread from a few months ago, where an HN-user's spouse (who is a physician focused on treating patients suffering Vitamin D toxicity) gave a stark warning that she has personally seen many (hundreds of) patients on ~5-10k IU/day intake hit toxicity because they did not measure their levels. Be careful! Definitely try to get a test for your levels, definitely consult a doctor if you can. If you can't, know that 5k+ can be too much for some people.

(For the record, I began taking 1-2k IU/day in March.)