My (27M) girlfriend (26F) is convinced my diet is the source of chronic health issues, how can I prove to her it's not?
For the past few months I've been dealing with a few moderate health issues. I'm in the process right now of getting them investigated, but long story short I've just generally been feeling ill a lot lately. It's mostly that I have these episodes where my stomach gets really upset and I get a bad headache, but I've also been dealing with general fatigue and brain fog pretty often too. It started mostly much back in May and seems to happen about once a week, sometimes more. I still have a lot of days where I feel normal too though.
My girlfriend has been feeling insecure about a lot of things lately, and keeps comparing herself (and me) to our friends. We're both unemployed right now, and long-distance, whereas some of our friends are like getting married and have great jobs. But in particular, she's been really fixated on weight-loss. Both of us are overweight and definitely would benefit from losing weight, but we're not obese or otherwise in bad health directly caused by our weights.
Ever since these health issues popped up, she keeps trying to convince me to make really big changes in my diet, and in a lot of ways I have. I was eating a lot of fast food previously, and generally just eating unhealthy, but I've cut down on that a lot. I've also started to eat way more fruits, vegetables, and drink a lot less soda. However, despite doing this, my health issues have persisted, and in-fact, seem to have maybe gotten worse. In some ways, I think part of my problem is that I actually may not be eating enough on a lot of days (like, less than 1000 calories). A few weeks ago after a really busy day I got myself a pizza and it was the largest meal I've eaten in a long time and despite it being a greasy pizza, I actually felt the best I've felt in quite a while that day and the next after eating it.
The other issue is that a lot of the diets and food suggestions my girlfriend talks about seem to be "fad" diets. Like for example, she has told me a bunch of times to cut out gluten, but I've been tested for Celiac disease and don't have it or any gluten intolerance. I even did still try gluten free for a few days and it had no effect.
I have some tests coming up (colonoscopy and then probably MRI) which should help to really track down what my issues are coming from. But in the meantime, is there any way to get my girlfriend to just... kinda stop with getting onto me about my diet?
Edit: So even though I maybe have been downplaying how bad my diet still is, thank you guys for calling me out on it. I kinda made this post in frustration after a conversation with my girlfriend that ended up looping back around to fad diets again. But, as I've been reading through the replies here, I do think my diet probably is a big source of my issues.
Some extra info I didn't initially include: alongside the issues I talked about, I've had some blood in my stool too, which is part of why I'm going to get a colonoscopy. Also, back in January I ended up in the ER with something that resembled a TIA/ministroke, and at the time they thought it was just dehydration, but I never got full imaging of it, and now that I have been having headaches it's why I'm going to likely be getting an MRI as well. That being said, I have already had blood work, stool samples, and urine samples all taken and everything came back shockingly normal on all of it.
I was doing the math while reading some of the replies here and honestly, I probably am not eating enough, and not getting enough nutrients. Ik some people have said I may be exaggerating the under 1000 calorie thing, and yes, on a lot of days I eat a normal amount, but there definitely are many days where I've only had like 1 light meal the entire day. In fact, there was about a whole month between late May and late June where I didn't really much at all due to a bunch of factors, and that is kinda where this all started.