There is NO distinction between 'shedding' and 'loosing hair from male pattern baldness'. Both involve shedding.
Here is how it works.. lets consider 2 people. Person A has 100 hairs, and has male pattern baldness.
Person Z has 100 hairs, but does not have male pattern baldness.
Both people go through a shed, and both lose 10 hairs from shedding. Now, BOTH of them have 90 hairs.
Person A, who has male pattern baldness, will regrow those 10 hairs, but they will grow in a bit smaller and a bit more thin than the previous hairs.
Person Z, who does not have male pattern baldness, will also regrow the 10 hairs.. but these hairs will be the same size and thickness of the shed hairs.
Over several shed cycles, and yes, both male pattern baldness and non male pattern baldness people shed and shed at the SAME RATE, the male pattern baldness person's hairs will gradually get smaller and more thin, to the point where they become almost invisible 'vellous hairs'.
So, trying to determine if you have male pattern baldness by looking at how many hairs you have shed is meaningless. The rate and number of shed hairs will tell you nothing about whether you have male pattern baldness or not because looking at a shed hair will not tell you how big the replacement hair is going to be.