Could i b pregnant had a miscarriage or something else?

My last period was a week lng bt it waz every othr day an liighter thn norml. thn oneday lastwek i went 2 the bathrm 2 find i waz spotn thn i had real bad cramps i culd barely move thn hot flashes an dizzy an pukey. i went 2 da hosiptal an they told me nothing waz wrng? bt i dnt believe tht.