Hindi necessarily, mama, maraming tao ang walang side effects kahit tumatanggap ng pills, lalo na kung ang katawan mo lang talaga yung compatible sa brand na yan! A few of us mums didn't feel anything either pero nag-work pa rin, so best thing is to follow up with your doctor para ma-confirm na okay lang talaga at na-absorb ng katawan mo ng tama, lalo na first time mo pa lang. Congrats on completing a week though, rooting for you!