whats going on with my body!? 😭

every night I wake up in the middle of my sleep starving like I didn't eat anything for a whole day when I make sure I eat couple hours b4 I go to sleep.. I get up to use the bathroom about 4 times , I am suffering from extreme hot flashes that sometimes it gets so hot I have to strip my clothes off too cool down, in my sleep I'M always feeling like my stomach inside is swimming like I'M almost on a boat, nausea always arises during that time, sometimes even bloated so bad it hurts to try n use the bathroom sometimes .. n lately I been getting tired easily, for instance, last night I got tired at 6pm I usually don't go to sleep till very late n yesterday I couldn't stay up pass 9pm, I felt drained n fatigue where I didn't have the energy to do anything... I am not quite sure if I'M pregnant yet, I been waiting almost 3 weeks for my period n it's still not here but I'M getting all these symptoms.. but I was wondering, is it possible to feel all this because my period is late, might be a silly question but was just wondering.. any advice? comments?