Jessica Simpson: I'm Losing the Baby Weight for Me
06/28/2012 AT 10:15 AM EDT
And she says she's feeling better – not feeling pressure.
"Just so everyone knows...Weight Watchers hasn't put ANY pressure on me!" she Tweeted. "I'm trying to be as healthy as I can be for myself and I feel great!"
The new mom, 31, isn't stressing about the scale, either.
"It would be nice to feel comfortable in a bikini, but that's not my goal," she previously told PEOPLE. "I just want to fit into jeans!"
For Simpson, "life has completely changed" since welcoming baby Maxwell, 8 weeks, her first child with fiancé Eric Johnson.
"From how I sleep to what I think about," she told PEOPLE in May, "Maxwell has definitely taken over everything."