Thank you for responding.
A low platelet count is called thrombocytopenia. Many different things cause thrombocytopenia. Low platelets are usually caused by an underproduction or destructive process. Underproduction is usually related to a bone marrow issue. Destruction is caused by many things, such as infection, autoimmune disorders, hemolytic disorders, etc. In addition, a large percentage of cases are idiopathic, meaning there is no known cause.
The life of a platelet is about 10 days. Whether it was a underproduction or destructive process, your body seems to be functioning normally again. Chances are you may never understand why this happened; however, if you do recall anything that changed in the 2 weeks prior to the low level, such as new medication or dose change, I would mention this do your provider. I suspect the hematologist will likely recommend more frequent platelet monitoring over the next few months, assuming that the rest of your blood work is normal.
In the future, if you ever notice symptoms of easy bleeding, such as gum bleeding or easy bruising, always report this, even if you consider it minor.
I hope this helps to explain. If you have additional questions or concerns, please let me know.