I need peace of mind, I need to know what could be the reason and if this sounds like I have cancer? I'm scared and can't go to bed tonight?

I deal with lymph nodes that come and go on the back of my neck or stay small for years, before I use to get them in my armpit, then I got hives really bad all over my body with a small fever in the end of the summer (I was under lots of stress) and my mom and grandmom get a hive or hives when stress bug I was the worst, I get dizzy and recently I been getting sting dizzy spells band I feel that I'm going to lose my vision or the room gets darker, I get very itchy and dry skin and like a rash that comes and goes on my hands, the last two nights my appetite wasn't all there when I ate dinner, I woke up one morning with lots of phlegm and I was crying about something and coughed up phlegm with blood, I know I was getting like a wheezing feeling and sound sometimes that I had for awhile but not anymore, I had cancer when I was 3 wilms tumor first stage and people said I'll be married and have kids and be fine, now I'm 17 and scared I have non hodgkin lymphoma or leukemia

Once when I kept getting sick non stop I thought it was cancer but it was just the doctors weren't giving me the right medicine it went on for almost a year

I once had a bad hive rash years ago and went to the doctor and the doctor said it was do to stress and the nuts I had but this time around my hive rash was really bad because this one lasted for almost a week and just bad, I I'm a very nervous person with stuff always running through my mind but when I google lymphoma I have the symptoms