I ordered ketostix after noticing ammonia body odor

I am a 23 year old female. I ordered ketostix after noticing ammonia body odor in the morning without sweating. Is it normal to have ketones in my urine within 4 hours of a high carb meal? My breakfast every day is 2 large slices of sourdough toast with peanut butter, the bread alone is 54 grams of carbs. 4 hours after eating my urine ketones are 15-30 and by 6- 8 hours 80-100(even with no activity, like sitting at a desk). No traces of glucose in urine, however there is trace protein levels. I have been treated for sibo 2 times in the last 4 months after suffering from it for 7+ years and doctors ignoring my pleas for a hydrogen breath test. One doctor even put me on a proton pump inhibitor to treat nausea and tetracyclines for acne which resulted in my weight dropping from 115 to 96 (both were actually being caused by sibo and those are THE WORST drugs to give someone who has sibo, another reason I do my own research now instead of trusting doctors). Im now about 104 but my new doctor says dont lose any more weight, and Ive been trying really hard not to. Sorry about the long post, I wasnt sure if the extra info was helpful. Since I eat starch with every meal(in the form of potatoes or sourdough bread) then why am I going into ketosis so quickly?