Sick and losing weight...

So about 2 weeks ago, I started coming down sick. Thursday before last, I was told it was an upper respiratory infection. Over the span of a few days, I didn’t improve but got worse. So last Tuesday I went back to the doctor and they did an X-ray. Said I have pneumonia. Well, I went back Monday, and the infiltrates they saw in my lungs had gotten bigger rather than smaller.... anyway, the first day I went to the doctor, I weighed about 224-225... the next time it was 219.... then Monday 213... today, 210! Mind you, I have hardly been able to eat bc I just don’t have an appetite.... I told my husband I was concerned about the fact I lost so much so quick... “well you just came off a medicine.” Which is true, last month I came off of abilify. So idk if that is also playing part in the weight loss or not. But I feel like I shouldn’t be losing so rapidly! Am I freaking over nothing?? I will be monitoring my weight... I’m just worried something serious is going on with my lungs... (will be seeing a pulmonologist soon, and will speak on the weight loss as well.)