So my body feels tired all the time. My exams have been going on since the last month and I have them till the end of February and I'm not one of the people who get stressed over exams, instead I'm calm. I have changed my sleep cycle a bit and a little bit of change in my diet as well. My body feels sore all the time when all I do is eat, study, check my phone and sleep, maybe a little bit of dance or singing. Also, my period was supposed to come yesterday and I have been getting regular periods for quite a while. What might be wrong?