Ah sis, I've had friends who tried the injectable, one of them had spotting for the first few months, pero nag-normalize na after, at yung iba naman walang problema talaga, super convenient lang because once every three months lang. Honestly, everyone's body reacts differently kaya importante na ma-discuss mo talaga with your OB kung ano exactly ang makikita mo sa body mo, lalo na if may existing conditions ka. Pero from what I've heard sa circle ko, most of them are happy with it dahil convenient at effective, just make sure you're with a doctor na trusted mo para ma-address agad anumang concerns!