I'm sick of being sick

I have a cold. Yesterday was the worst of it, I seriously thought I was going to die. I wanted to die. Today is better, but I'm still under the weather.

Something odd I've noticed the last few times I've gotten sick since losing 85 pounds. I seem to get sicker. The symptoms are more intense, I feel worse. Even a simple cold isn't a simple cold anymore. It knocks me to my knees. The cat bite, it almost killed me. The last time I had the flu, it turned into a month long bout of bronchitis.

I really don't understand this. I take vitamins, I eat really healthy for the most part, I exercise like a lunatic, yet my immune system seems weaker, like it can't handle the simplest of illnesses.

I'm physically stronger, I can lift heavier weights, walk farther, work out harder, but my body seems very susceptible to getting sick. I don't like this. When I was fat, a cold was just a cold. Now it feels like it's a death sentence. What's up with this? Anyone else notice this, that you're sicker now that you weigh less? It just doesn't compute.