It's simple to get the RSS feed of your profile page. Just go to your profile by clicking your user icon at the top of any page and add ".rss" to the end of the page's address.
For example if your username is "johndoe"
...then your profile is: http://weheartit.com/johndoe
...and your RSS feed is: http://weheartit.com/johndoe.rss
What is RSS?
RSS feed (Rich Site Summary) is a standard format used to summarize frequently updated information from blogs and other types of publications. You can view RSS feeds using a tool like Google Reader.