This is almost correct, you just need a few changes. Your sentence is actually two sentences which are as follows:
You have liberated my heart
and
I couldn't do anything now
In the second sentence we'll change the word "couldn't" to "can't" to make it present tense and we'll add the word "and" to link the sentences so the end result is:
You have liberated my heart and I can't do anything now.
Hope this helps!