Possible Colitis Flare Up?

Hello, this will be a long post. I'm new to this site, but I've had both Crohn's Disease and Ulcerative Colitis for nearly a decade now and have Generalized Anxiety. I am a female, currently 24, and having a lot of odd symptoms. About 2-3 years ago now the lymph nodes on my neck were suddenly swollen. They don't hurt except when I'm sick like the flu, cold, flare up, etc. An ultrasound showed they weren't big, so the doctor said it was nothing. In these 2-3 years I've also had more problems with my Crohn's/Colitis, small flare ups here and there, I also caught COVID-19 in June 2020 with severe symptoms. Luckily I recovered, but in October 2020 I had pain when I eat, spastic colon (either constipation or diarrhea) and my GI put me on Prednisone for 3 months. I think it did help a great deal and my recent colonoscopy showed my Crohn's is in remission (Thank goodness) and my Colitis is not very active. But since the start of 2021 I've almost completely lost my appetite, I've dropped 22 lbs, become intolerant to a lot of foods (I'll throw up instead of being able to digest it), extreme fatigue, headaches, spastic colon, and my cervical lymph nodes and even ones in my armpits are aching. I have been under a lot of stress and Anxiety, but I don't know if it's all related, or I'm just being a hypochondriac. Anybody have any tips?