MASSIVE HAIR LOSS in shower! seriously concerned!?

seriously i don't know if it's because it's summer and i'm malting or something but i keep loosing about 30+ hairs in the shower recently!!! i dont know if it's normal or bad but i hate it so much, my hair isnt super thick or thin it's like fine strands but i have a lot of it and it's like past my shoulders so i guess you would class it as border line long but seriously i want it to stop falling out! is this normal??? it's not just the shower i lose it like during the day brushing running my fingers through it etc... i know everyone says 100 hairs a day but really is that true? help would be awesome thanks! (no rude comments please)