Jessica AlbaJessica Alba has revealed she’s finding it difficult to get her head around how her body is changing during her pregnancy.

At nearly five months along, the Fantastic Four star is developing quite a sizeable bump and she told the Today Show recently that while it’s not obviously a complete surprise, it’s still a bit disoreintating to gain so much weight so quickly: “You go, ‘What’s happening?’ You definitely have to go with the flow.”

“You have to surrender, but it’s a shock to the system.”

The baby, with fiance Cash Warren, wasn’t planned but Jessica explained that she’s happy to be expecting: “I’ve always loved kids and I’ve always wanted kids, so this is, you know, it’s kind of perfect.”

“I feel really blessed. I feel really lucky. This is the best time ever … It’s the best year.”

However, she became coy when asked whether her “best year” would include a walk down the aisle, just replying: “I’ve thought about [getting married]. I’ve thought about it, yeah.”