started metformin on june 23 n i always geta period monthly . i started taking it n like 2 days later alot of clear egg white discharge came out stretchy and alot . n now this month my period dindnt come. and this couple 3 days i been having waist pain only wen i lay down n den it goes away wen i stand up . ?? wat can it mean or ??? n no period .. n i feel i get it but i go to the restroom n clean n its like water ??? anyone ?