Hi, I am of the opinion that, you need not worry about this right now.
you have started the weaning process, and symptoms such as
constipation and loose stools are common.
i would advise my patient to
1) To start the weaning by 6months, add one food at a time, give in small amount to start with.
2) Weaning is only supplementary, breast feeding should be continued.
3) If loose stools,
fever arises then consult your paediatrician immediately.
4) Immunize the child as per the schedule.
at now introduce single food in incremental amounts.
Hope I have answered your question. If you have any further questions I will be happy to help