Seroquel and oxygen level

Hi all, I'm hoping someone here with Seroquel-experience can help us with some information. My wife has been on Seroquel for approximately 5 weeks (ramping up to 200mg per day during the first 10 days, approximately). After 4 weeks, the severe breathing problems started. Physicians have verified the oxygen level in her blood to be excellent, her lungs and heart are in perfect shape, she has no fever and no indication of bacteria-infections. All indications are that this is caused by the Seroquel. She explains the intense sensation as drowning, almost passing out while gasping for air. She's feeling very dizzy, probably due to breathing too much as a result. Occasionally her breathing is not so deep, but more like hyper-ventilation. The problem became unbearable (and my wife endures a lot) after approximately 1 week, so 5 weeks into the Seroquel scheme she quit cold-turkey two days ago. The breathing problems are still the same. We are hoping someone could tell us how much time these breathing problems can be expected to remain, as I've googled my eyes out without finding any information on this. A week? - Two weeks? -Even more? - please respond, and in advance, thank you for your help!