Welcome to Gaia! ::

i feel the same but mine's switched around, i can play flute but i can't plat trumpet

there are some fingerings to help you reach ome high notes. Like a high d is just your thumb, middle finger on your left and the rind finger on the left. then high e flat is all the fingers except the thumb is playing the part of the key that you play b natural with (if this makes sence) sweatdrop and then high f is index on left, ring on left, index on right, and thumb

if you need higher registers here's a chart that may help you out
http://classrooms.tacoma.k12.wa.us/jlms/sdepuydt/documents/flute.jpg

tighter ambesure, faster air flow, and on the high E natural, don't use your E flat key, it makes the note come out a bit easier, which you need cuz even seasoned flute players have issues with that note. It's evil!