YOU SAID:

i really feel like my period will last long

INTO JAPANESE

生理が本当に長く続く気がします

BACK INTO ENGLISH

I feel like my period lasts really long

INTO JAPANESE

生理がとても長い気がする

BACK INTO ENGLISH

I feel like my period is too long

INTO JAPANESE

生理が長すぎる気がする

BACK INTO ENGLISH

I feel like my period is too long