Back on the pill-having issues

I've been on the pill for almost 2 years. I went off it for a little because i went back to my hometown in june for a family emegency and left it back home and didn't get a refill until now (its the 3 month birth control). Well i took it the other day and the next day (yesterday) when i got to work i was not feeling well. even though i got over 10 hours of sleep i just felt exhusted and disconnected... idk even know how to explain it like i just wasn't myself and i wasn't all there and i had a killer migrane. when i got home i couldn't even get to sleep and advil didn't help my headache at all. i also was feeling like i was gonna throw up and even though i had on a sweatshirt and two blankets i was freezing yet my exterier body tempature was burning hot. i was also having really weird dreams. i woke up in the middle of the night and was sweating my ass off. then when i got to work today i had to leage early because i was having really bad stomach issues (and i didnmt eat anything out of the ordinary). I was just wondering if anyone else has had a similar experience. Could this be me adjusting to my birth control all over again? The only other reason i can think of is that i'm over working myself. I'm on day 7 in a row working and not getting a day off for 5 more days. Also when i started my birth control the first time i never experienced this sickness. it feels never ending..