Hi.. Low oxygen saturation may cause breathing problems... They could be secondary to pulmonary artery thrombosis which needs to be treated on emergency basis or secondary to the paraesophageal hernia.. In presence of DVT and pulmonary artery thrombosis, you need to be hospitalised and treated with heparin.. Hence it would be better if you are hospitalised, that is if it is feasible.. Discuss these with your treating doctor...