Sick with the same symptoms I had 2 weeks ago???

November 18th I got sick with chills, aches, congestion & cough. Tested negative for Covid & didn’t have a fever. I took emergen-c, Sudafed & mucinex & slept a lot for a day & after just 3 days I was recovering. Now the symptoms are back.. yesterday I had a 100.2 temperature, chills, aches, congestion. Fever was gone by morning, taking Sudafed has already greatly reduced the nasal congestion but a cough is already forming. I also notice the lymph nodes in my neck are sore to touch. Again tested negative for Covid, already feeling 90% better from yesterday but just wondering if this is concerning considering the timing of getting it again so quickly? Or if it’s just because of winter & illnesses spreading so much? I usually don’t get sick again for a while after being sick so that’s why I’m concerned