Sounds like you're having a hard time of it! Give you and your baby plenty of time to get back on track after the overseas trip, everything will be out of sorts for a while.
On the constipation front, prunes are great for us! I got the idea from this web site. You boil them in water for a few mins, mix in blender to puree then sieve to remove stones. I bought ready to eat, no need to soak, stoneless ones ,but they did have a few bits of stones so very important to sieve. DD likes them with oats, apple or pear, yoghurt(sounds like you should give that a miss) or even on thier own. They freeze well in icecube trays.
She has a bit of prune every other day to keep things moving :oops: IYKWIM Even if you need medication to help this time prunes might help keep a balance on a daily basis.
Just a thought, would homemade veg and protien be less constipating than jars due to the fillers and stuff in them? I don't know if this is the case, just a thought. I wasn't too confident in making food for dd, didn't know what to make! but I got the Annabel Karmel book form library and it is so easy I asked for it as a christmas gift. I really reccommend it.
HTH
let us know how you get on.