Ok so I have already asked but no one answers it properly anyway if a (hacker) got hold of your ip address could he go on a website and the staff/admin w/e trace it back to you??

Yes, NSA- NASA- CIA -ABC-HOMELAND SECURITY, MI5 SCOTLAND YARD AND APPLE. 

Can track a tick on a flea.

There're tracking you now😎.

Essentially. If a "hacker" would be able to setup your modem as a proxy bridge and mask its I.P. with yours it would be possible.