Kindly consult a Psychiatrist for these symptoms.

In this age group, as you are 30 years, the most common reason for forgetting task/things etc is inattention and lack of concentration due to ongoing stress about anything. During stress, a person is mostly preoccupied with the ruminating ideas/thoughts/apprehension about known or unknown fear or worries. First define you stress and its cause. It could be anything related to some life decision or even due to relationship problems.

Its a warning sign of stress intolerance u may land up in major depression consult asap

Preoccupation or anxiety or depression are possibilities

Any kind of stress Any history of anxiety Any history of thyroid Is ur sleep normal

Inattention due to depression or anxiety may be the causes of such forgetfulness at such early age