Can there be a chronic infection lasting for years with a normal complete blood count?

Hi doctor,

I am a 36-year-old male with a height of 5.5 feet and a weight of 125.6 lbs. I have weight loss of 5% on average every year for the last six years. I am eating very well or better to get back to my average weight. Six years back when I moved to a new room as part of a new job and stayed with few men. After a year, I realized one of them was going to the wrong places, which could cause health issues, and I moved out. I think I got sick one time for a couple of days when I stayed there. During that stay, that guy used to prepare food sometimes, and we even shared room items. The new job was also stressful for few years. I do not know if I am overthinking here. I noticed that my weight started lowering at an average of around 5% each year, and I started developing allergies to pollen, dust, and morning sneezing. CBC (Complete Blood Count) and CMP (Comprehensive metabolic panel) came normal for the last three years. So I decided to wait and watch. However, I see weight loss continuing. Over the last two years, I have slight joint pain, digestive issues sometimes. I did a CT(Computed Tomography) scan and upper endoscopy. Doctor found no related problems. In recent blood work, I got to know I have Hashimoto’s thyroiditis. I also read like some infections could cause symptoms like weight loss and autoimmune disorders like Hashimoto’s. In the list of viral infection tests I did so far, I have HSV-1 detected. But I read that it is more common, and it will not create any symptoms other than mouth ulcers. I am also attaching a copy of my recent blood work and stool test to check for any pathogens. Based on this, could you please help me with the below details? Could there be some chronic infection lasting even for five to six years with normal CBC and CMP results? If so, is there any test I could do to check for all possible infections or all viral infections? If a condition lasts for around six years, could that be viral, bacterial, pathogen? Any test to check for chronic viral disease? Is there any component in annual blood that typically indicates signs of possible chronic infection?

Thank you, doctor,

I am not married. I do not have any unprotected sexual exposure with community sex workers. I do not remember have a history of night sweats. Sometimes I wake up in between because of the cool room temperature. I get stuffy and runny nose and continuous three to four sneezing for an hour after waking up most of the days, mainly during pollen season and rainy days, or waking up a little early. After that, most of the daytime will be fine. I do not get a cough anytime. I have a pollen and dust allergy too. I do not remember having a fever in the last two years. No history of jaundice. Previous three years, CBC blood work came normal. Differential WBC count remained at the same standard level for the last three or four years. Is it possible to have these in normal range with some underlying infection? I started investigating too much because many things look related, like weight loss is consistently happening for the last six years, I am feeling a little bit weaker day by day, developed autoimmune Hashimoto's without a family history. I want to make sure I am not having any chronic viral, bacterial, pathogenic, or fungal infection that makes me weak year by year. I also read Epstein-Barr Virus, and some HPV could cause autoimmune disease. Can you please recommend the tests?