This seems really low, like, really low carbs, to be cycling from 80g-150g, and to be at 80g 5 days a week, that's rough. Protein also seems high. It might be good to lower protein, lower fat, and raise carbs a little more. It doesn't seem like you're giving yourself much room to keep cutting if you're already at those low carbs.
I bet! Since you don't have a show coming up or something, it might be good to go back to maintenance or ease up on the dieting for a week or two and recover, I bet your metabolism might have some good recovery as well.
I would recommend lowering fats and raising carbs if you're feeling that way. Carbs are FINE and don't need to be avoided so much, provided you're having quality carb sources. Save the higher GI stuff around your workout, but thinks like Ezekiel bread, fruit, oats, these are all great to eat at other times of the day. You don't want to overdo it with the carbs, but for someone who is 184lbs, those numbers seem very low. You could lower fats to 20% of your daily cals and sub carbs for the rest.
Very sorry to hear this man, no doubt that will raise the cortisol. I know Brick will have his methods, personally during the end of my prep when things were in "everything sucks" mode, I would try to keep cortisol at bay by making sure I got enough sleep (sleep sucks in a hard diet, but doing things like not watching TV before bed, getting my Z12 and minerals in, working the pre-bed ritual certainly helped), hitting the therapy pool/steam room/sauna in my gym (fortunately my gym has these things), relaxing with my feet up when the opportunity presented itself and trying not to worry about things I couldn't control.
I will say that if you feel cortisol is affecting you this much, for a non-contest dieter, you should really elevate your carbs and pull back the diet for a week or two. In an effort to get lean, it's easy to become carbophobic, and it only gets harder once the body starts fighting you that hard. Protein at 1g per pound, 20% fats and the rest from carbs is a great diet, I'm pretty sure I saw Paul Carter post that ratio recently as well on a T-Nation article. I'm using that ratio for my prep now and it's going very well.