Whats wrong with me :S :S ?

I had my period but it was a lot lighter than normal then 9 days after my period i started to bleed quite heavy and there was masses of clots it only lasted for 3 days so i don't understand what it was i had recently before that being feeling sick and nausea during the day but it gotten worse on the evenings and it is still happening :/ and i also had a weird liking for those iced split things from greggs which is just weirdly only cream in a bun with icing on the top well anyways i hated them before. whats wrong with me :/ ?? i also keep getting really bad mood swings like my mood could rapidly switch from really great to absolutely foul and i have been unable to sleep :/ but i think that's just a different thing that's the reason why my bf cheated on me :/ but what do you people think is wrong with me i don't have a clue :/ ??