Tori Spelling is thrilled to be expecting her fifth child with Dean McDermott, but an insider claims that the 43-year-old star is "worried sick" that the placenta previa that plagued her fourth pregnancy could return.

As Breaking Celebrity News reported, just 20 weeks into her last pregnancy, Spelling awoke to blood dripping down her leg.

After the mom was rushed to the hospital, she learned she had the rare and potentially deadly condition placenta previa, which occurs when placenta covers the opening of the cervix, often leading to internal b