I had a similar situation with everything about 10 years back,...

I had a similar situation with everything about 10 years back, even the smallest dose of Vit D made my lip swell up. Turns out my liver was gunked up so I did this over the course of a year (about once every 4-6 weeks) and haven't had any issues since. Am now taking 5000iu of Vit D daily and a bunch of other supplements (yes we eat properly too).

https://tinyurl.com/pys5ckpd

(Not medical advice, read it and you'll know if it's for you or not. I had ZERO problems over 10 flushes, only benefits)