I am an 18 year old female and I'm quite worried that I could have cancer. My siblings and parents haven't had it, a lot of my mum's side has.

About two/three weeks ago I started having night sweats. I would fall asleep around 7pm and wake up at 10pm absolutely sweating, red and really thirsty. I would have palpitations as well which I could hear, like my heart was beating in my ear. I don't usually wake up sweating if I go to sleep past 12am, but if I go to sleep early I will. 

When it happens I check my temperature and it is completely fine at 36.5 ish degrees. 

I went to the doctors last week and he checked my temperature and looked at my lymph nodes. They are not swollen at all. However, I do get some strange throbbing sensations in my back, knees, hips which have started recently. If i push on my left side of the bottom of my waist it is painful. That place will continue to hurt for a minute after. I didn't have that when I went, so if I see him again I'll mention it .He wanted some blood tests which I have had now, but I don't know if I will get the results back, and I got told by my parents that if they are normal I won't get a call.

Yesterday and today I haven't felt hungry. I've eaten a bit less than normal but I have eaten enough (1500 calories ish) so that I'm not harming my body. I've eaten for the sake of it. I am ALWAYS starving at 5:30 pm for dinner, now I can eat at 8pm and wouldn't be bothered if I didn't. Normally, my stomach would be rumbling a lot. Still live at home so I have to eat regularly anyway. Tonight at 9pm I felt like it was over 30 degrees, my cheeks were bright red and everyone else seemed fine. 

I'm worried as this has never happened before, only this past month or so. I can't think of what it could be.

I suspected lymphoma could be a concern but my neck lymph nodes are fine...