Opinions?

So I was on mirena for about 7 months and decided to switch to try to lose weight. Well I switched to the pill. And I’ve been on that for about 3 weeks. Well I’ve been experiencing some body temperature issues were I’ve been very very hot! I’ve been nauseous or upset stomach, extremely tired, and extreme headaches maybe even migraines. I had an episode today at work where the music playing gave me the worst headache. THE worst!!!! I took a pregnancy test and it was negative just to rule that out as an option. Has anyone experienced this or would anyone know what this could be caused from? Any advice is very appreciated!