Seems to be sudden thinning of hair on top of head. Always had thin hair, didn't pay attention earlier. MPB or TE? (Photo)

Male 25. Think I have a sudden thinning (didn't bother before) of hair on top of the head specially in the crown. But the hairline seems to be intact. It seems like hair is not falling off much, as only few hairs get on brush, but it looks like the hair is becoming sparse or the strands are thinning. It looks really sparse when wet, when dry it looks fine from front and side I had a very psychologically stressful event 3-4 months back. Could my hair loss be a result of Telogen Effluvium or MPB?