Is these symptoms of brain cancer?

[QuadratA]

Yesterday, I woke up at the evening (at 5:30 PM), after having slept for only 3 hrs that day. That was the second or third day I have slept irregularly and very very late (in the afternoon). At 7:30 PM (i.e two hrs after having woke up) I held my phone lying on the couch. At that precise moment I started feeling dizziness and a headache at the right back of my head. It kept coming and going, especially when I lay down. It disappears when I start walking. Today, having slept well and about 8 hrs I feel much much better, but there still some trace of a headache (not severe at all). Is there any way to make sure that this is not a tumor, given that I have no family record of brain cancer.  

[auntiejessi]

Brain cancer isn't what I would think of first.

Are you in quarantine/self-isolation/lock down? Everyone's routine has changed. Your activity levels have changed, which will change your sleep habits.

Have you been able to go outside and get fresh air? Even if you can just go into your back yard or onto a porch for a little while, that will help.

If you aren't working or going to school, try to find some activities to keep you busy, and stay to a routine sleep schedule as much as possible. Clean your house, play games, do homework, read - whatever it is you can do. Sleep at night and be awake during the day as much as possible.

Perhaps you were sleeping in a funny position on the couch, and that caused a headache.

Unless the pain lingers, or is severe over a few days, I wouldn't think anything serious is wrong.

[QuadratA]

Yes I’m in quarantine. It is not a severe headache that I have now. But yesterday I felt like having a low blood sugar.