It could definitely be stress.
If it doesn't get better with time then I'd try some Chinese meds.
like those 3:
Cure Memory Loss With Ginkgo Biloba
Ginkgo Biloba is the oldest living tree specie with its leaves as one of the most widely studied botanicals of today.
Ginkgo is highly recommended all over Europe as a treatment for dementia and Alzheimer's disease.
Studies show that it improves the cognitive functions of a person as well as his daily living activities. Ginkgo is available in capsule, tablet, tea, and liquid extract form. However, you have to seek medical advice on how to regularly it as a treatment for memory loss.
Ge Jie Da Bu Wan remedies For Memory Loss
This Chinese medicine made from the different tree roots that are found in China helps boost the qi (energy) and yang (functions of the organs in our body).
It also helps in nourishing the blood. For best results, take 3 capsules of ge jie da bu wan 2 times a day.
Gui Pi Wan for Memory Loss Treatment
This Chinese herbal formula is believed to be effective in treating poor memory and concentration.
Gui Pi Wan is made of 100% pure and authentic Chinese herbs of high quality. Traditional preparations and procedures are combined with modern pharmaceutical ways of extracting the active ingredients from the herbs to create pills and tablets. Take a total of 8 pills per day thrice a day. The formula is best taken before meals.