Does my hair line look receded?

I'm 19.. I've asked my derm about 5 months ago and he said my hairline looked normal and that some people just have higher hair lines. However, lately i've been seeing a lot of hair falling off in the shower and it's starting to worry me.

here's some pictures.

http://i51.tinypic.com/2qdy5q0.jpg
http://i56.tinypic.com/xlzc6v.jpg

should i be worried?

I wouldnt worry, at your age my hair was higher than that at the peaks.
You look to have good thick hair.
Probably just maturing into an adult hairline.

BTW, i am by no means an expert, just my opinion. ;)

i have a lot of hair but it's very thin hair.. and it's always fallen off easily but lately it's been very noticeable in the shower (last week or two) and i have also been very stressed lately. i will ask my derm again next time i see him again. thanks for your input.