Hiya, we need the ranges of your blood tests (the number in brackets) as different labs have different ranges. Going by your typical ranges, you're certainly not under medicated, and possibly look quite optimal to me unless you're having any hyper symptoms.
The NHS consultant will tell you to drop the T3 at the mo because they've got in a bit of a predicament whereby only one company is licenced to supply it and they've obviously whacked the price up - and I mean extortionate prices - hundreds so they've been told not to prescribe. However the guidelines state that they shouldn't take them off you if you have good reason to be on them.
Can I ask why you only take the levo five times a week - is it because 75 a day was not enough and 100 too much?
Being over medicated can cause tiredness so check the symptoms of this and make sure you're not having any but otherwise I would suggest that your fatigue is being caused by somethings else.
Many of us thyroid peeps are low in nutrients like Vit D, Vit B12, Folate and iron which can cause fatigue and other issues so it's important to get these checked out.
With your stomach issues, my best suggestion would be to go gluten free as often suggested on here and many of us find this improves our issues massively especially fatigue and tummy issues. Most my issues cleared up after doing this and my thyroid levels became much more stable. However, it has to be 100% gluten free and for at least three months to see if will resolve. If this fails, you could try an elimination diet to see if any other food groups are the cause of your stomach issues. If nothing food wise seems to help, there's other things you can look at or speak to your GP about them although they're likely just to say IBS!!!
Many doctors are pretty pants with thyroid issues and nutritional deficiencies so it's always worth posting all your results on here for advice.
Hope you feel better soon