Ever have the doctors not listen or help you? Can anyone relate to these symptoms?

My husband is in the Canadian Air Force and his so called medical care of the military is NOT helping at all. They aren’t listening to him and they seem to be guesstimating what’s wrong with him while trying a few tests here and there. But now he’s really REALLY tired needing to sleep a lot just to get enough energy to make it through the day. He gets these “attacks” of something that started once a year (about 5 years ago)and then recently 2–3 times a week and has snowballed over the past couple months into a few times a day and he’s just exhausted. He’s 30 yrs old, 5’11” and 230lbs (stocky) and they told him to lose 50lbs and THEN they will let him off the high blood pressure pills the recently put him on (one of their half ass solutions that’s not working). Its now worse today so his boss called the MIR (military docs office) and the “nurse” (med tech) said until he starts to take his meds they won’t help him (this is BS, because I see him take his meds. I can’t call to vouch for him because he tells me he could get charged with insulting that rank.. sounds stupid if you ask me) and this is only some of the problems from them. In short his symptoms are:
Upset stomach with a lump feeling in his chest that leads to
Can’t breathe well (like through a straw) that leads to
Nauseous-ness and feeling faint (never actually gets sick or faints)
And now fatigue (but when he eats he feels better for about an hour but then deteriorates)

They tried and tested for:
Ulcers (came out negative)
Bad Stomach bacteria (came out negative)
Candida (was a waste of time)
Tested 24hrs worth of Urine (answer comes back June 12)
They did an ECG came out negative
Full blood work came out negative
– He’s athletic and plays a lot of hockey; he used to feel better once he got playing the game, but not anymore. I feel they are pushing him aside because they feel he is a nuisance, but I’m extremely worried about him, the next big attack I’m taking him to a regular hospital to the ER (which is they only case they can see a regular doctor in the military). I’m 8months pregnant and can’t do much around the house and we have a 4 yr old girl too, I need him healthy. I know I can’t get any medical diagnosis but at least can anyone relate to these symptoms? Or have any insight? I feel I’ve hit a wall (I’ve Googled the crap out of all his symptoms, but to no avail).
wow, sorry for the length, this is the short version