The star has taken to Twitter.com to sound off about the security check drama, revealing guards refused to let her board the plane with containers of milk, because Milano wasn't carrying her baby.

The upset actress writes, "@HeathrowAirport just took my pumped breast milk away. 10 ounces. Gone. Not okay... They said they would let the pumped milk through if I had the baby with me. Why would I need to pump if I had the baby with me????"

She added, "Why can you test my toiletries to make sure they are safe but you have to throw away my breast milk...? It was less than 5 ounces per container. Why is my shampoo okay?

"@HeathrowAirport I would have happily spread milk in different containers (which I travel with) to comply.

"PS. Another reason it makes no sense - when I got past security it was time to pump again so... I did carry on 5 ounces of breast milk. PPS. I travel w/ (with) a portable Medela breast pump on the plane."

And the drama didn't end there - Milano's alternative breast pump did not arrive at its destination.

She adds, "Hoping this is just a weird coincidence but my other breast pump that I checked w/ the rest of my baggage... is lost. Everything arrived at my final destination except my hospital grade breast pump. Filling out a lost baggage claim now."

Milano gave birth to her second child, daughter Elizabella Dylan Bugliari, in September (14).