My personal opinion is if a quarter of a cup is causing you that many problems, then a UT fast would cause many more.
If I remember right, the Martha Christy protocol is only one tablespoon per day. If you've read her book, that cured a multitude of ills for her. My recommendation is to either quit and try again or to cut back to just a tablespoon for at least a couple of weeks before increasing it. Some people handle it better than others. If you've been off of it for a while, it does take time for the body to readjust to ingesting it. I've been on UT of at least one cup a day for several years and one of the things that lets me know that I'm on track is that my urine has a light and clean taste to it. If I go off for a few days (have had to due to hospital visits) then it takes a couple of days for my urine to get back to that clean taste again. I can tell what I've been eating and how well I've been eating, just from the taste of my urine - and even drinking one large martini, I can tell the next day.
I've done them with no ill effect, in fact - I have gotten a more level mood
feeling out of them and I haven't had any adverse effects. However, I'd
been drinking my urine for 3 - 4 years before trying them.
I would think that if you're having significant detox from oral that perhaps
you would do best to leave the injections alone. Just my opinion.