She does know what she's talking about. There are several types of tapeworms you can get from undercooked meat: the pork tapeworm (Taenia solium), beef tapeworm (Taenia saginata), dwarf tapeworm (Hymenolepis nana), and fish tapeworm (Diphyllobothrium latum) from raw freshwater fish..
You can get tapeworms by eating undercooked pork. The cysts/larvea live in the meat; cooking it kills them off. Bacon's thinner so it's less likely (you'd probably notice the cysts/larvea), but the possibility of getting a tapeworm from undercooked pork is very real.
So, yeah. She did know what she was on about, and you did right to check with a doctor.