20 week old BF DD has been prescribed antibiotics 3 times a day for a chest infection. She really needs to get the dosage in her as she is coughing badly and bringing up her milk with it. She refuses to swallow from a medicine spoon or dropper, just purses her lips and spits it out each time regardless of how much of the 2.5ml l get in to her mouth. l am unwell as is my 2 year old DS and l don't really want to start expressing and mixing the medicine in, she has not had a bottle for around 17 weeks anyway. Any advice please ....