I think that tired and emotional is normal . Especially if LO is rejecting towards your. Can I ask how she is with the female foster carer?
Can you have an general chat with her, without anyone else present ? Listen very carefully to what she says . Ask her open ended questions and try to ascertain how she FEELS about LO. Don't ask this directly .
Remember it's her job to make this match work and she will not want to say anything to mess it up . She may feel that saying anything " negative " is unprofessional and she has to sell LO like a sales person.
You need to find out for yourself If LO have a history or signs of attachment problems ? And if som how bad is it and how much risk are you willing to take ?
Do you know why the last introductions disrupted ?
It's difficult to advise you, because it is a very stressful time and I suspect that the process has been badly managed . On one hand, it may be that Lo has some attachment issues and you are picking up on these . IME mums are much more sensitive to these things than dads, as they are used to being the main carer ( generalisation I know ) .
OTOH, it may be that the stress has triggered a health problem for you , and that you would benefit from some medication from your doctor . When you say you are crying all the time, do you mean that you feel a bit anxious and tearful she you are alone with youR Dh at home. Of when friends ask you how it's going ?
Or do you actually mean that you can't stop crying ?
You really need to talk this over with someone you can trust . Ideally a counsellor or therapist. but unless you have one already, time is not on your side. choose the very best listener out of all your friends and family . Someone who will not push their own agenda or minimise your feelings.