Mother’s Day is approaching and Melissa Rivers is swimming in a sea of emotions that include anger, crippling sorrow, resentment, laughter, remembrance and a little bit of sweetness.

“I can’t lie and say I’m not angry,” Rivers told the Daily News in filing a lawsuit, in response to her mother, Joan, 81, dying Sept. 4. from complications due to a botched medical procedure at Yorkville Endoscopy.

“I’m not a doctor, but from what allegedly — capital letters — happened, my feeling is (the death) was preventable,” Rivers, 47, told the newspaper “So, yeah, of course, I’m angry, who wouldn’t be?”

“When you land somewhere from a trip or you get somewhere and you go to pick up the phone and you realize you don’t have anyone to call or when something really funny happens.”

Her other focus is depicting her half-century bond with Joan Rivers in her memoir, “The Book of Joan: Tales of Mirth, Mischief and Manipulation,’’ which comes out Tuesday.

The tales in the book include how Rivers was incapable of keeping a confidence, how she loved handing out samples from her QVC collection in Third World countries, how she used to hide cash in Milk Duds boxes, and how she completely disregarded basic parenting rules when it came to her grandson, Cooper.

“Talk about getting the golden ticket for a grandmother,” Rivers told the Daily News.  “(With) Cooper, all bets were off. My mother says I’m a much better parent than she ever was, which is hilarious especially as I think her purpose in life for the last 14 years was to undermine me as a parent.”

“All of my friends have reached out, everyone’s been incredibly sweet and saying, ‘Come spend (Mother’s Day) with us,’” Rivers told the newspaper. “But the truth is as long as Coop and I are together it doesn’t matter where we are.”