mein thak gayi hun ( for girls ) mein thank gaya hun ( for boys )

main thaki hoi hoon (fm) main thaka hoa hoon (m)

Mai thak gayi hun!!

main thak gayi hun

If you are not happy with other 3 answers, you may say : main bahut (very much) thaki (got dired) hoon / thakati hoon (get tired) issliye (that's why) muze aaraam (rest) chaahiye (want)