Hi welcome to Health care magic forum . You had respiratory tract
infection and it is transforming into lower respiratory tract infection , that is why the phlegm is greenish and there is difficulty in breathing. As you are still in 7 weeks pregnancy
catagiry drugs should be used as far as possible. Of course if the infection is more other drugs also must be used .
Besides i advise you to follow some diet recommendations as Avoid taking fruits, juices, sweets, cool drinks, ice water, ice cream, brinjal, and fish. till you get complete relief from the symptoms.
Take more of green leafy vegetables, pulses, sprouts, milk, egg, meat, and dry fruits to increase the blood, general health necessory for healthy grouth of the baby, and resistance to such infections. Wishing for a quick recovery , ands thanks for calling.