DD is 27 weeks. We've been offering her food and trying to get her to eat for about 6, 7 weeks now, on and off. She really isn't interested at all! Every now and again she will open her mouth for purees or yoghurt on a spoon or a finger, but recently she has been keeping her mouth firmly closed against anything I offer. We have more success with finger foods or letting her hold the spoon and put it in her mouth herself, but its hugely limited success - basically, she just doesn't swallow anything at all, she dribbles it all out.
I'd prefer not to do BLW, though sadly (for me) its looking like she might prefer to feed herself. I would just prefer that some of her meals she ate off a spoon so I have some control over the amount.
What I can't decide at the moment is whether it is better to a) keeping offering her food at specific times, in the high chair etc., and hope she gets the hang of it, or b) just wait a week or so and try again. Trying to get her to eat is a little stressful at the moment, and obviously I don't want to make food stressful. I can't stress quite how much she is not eating anything that goes in her mouth 
And at what age should a complete lack of interest in food become something I should talk to a HV about?
(If any remembers me from a thread on weaning confusion before, that's because I'm really not at one with this!)