My Phone is in a bootloop and I don't no what to do!

Hi i have a Samsung S6 and i was having problems with it so i decided to reset it so i did so it was working fine all day then i put it on the charge over night i woke up and its now in a boot loop but the led is flashing yellow (because i had a snapchat notification) but my phone is fully off but the led it still flashing yellow anyway i can't boot it into recovery mode the only thing i can do is boot up the download one so i went on my laptop and downloaded a new frimwere install it but it is still in a boot loop and thr led is still flashing yellow I've spend all day doing what videos/wedsites have be telling me to do and its still doing the same thing if you can help me figure it out i would really appreciate it thanks. GD