I'm 24 and had typhoid fever about six months ago. Ever since, I've been feeling unusually cold, like I can't handle even a bit of cool weather, while everyone around me seems fine. Lately, I've been getting mild chest pains and sometimes, out of nowhere, I start shivering and getting goosebumps, even at normal room temperature. I feel sleepy all the time and get tired very quickly, even after light physical activity. Walking long distances has become challenging. I got married two months ago, and after the first few weeks everything was okay, but my health has been getting worse lately. I'm working but can't keep up like everyone else, and it's frustrating because even when it's not cold, I'm in a sweater and still can't shake off the chills. Why am I feeling like this, and should I be worried?