the scenario seems quite a lot different than you originally presented. You have been out of Canada for around 2-3years. If you have been out of Ontario for over 2 years you have to reapply for OHIP even if you have a valid card. Did you inform OHIP and CRA that you left the country in 2021 which is required? If I’m correct it appears that you got pregnant while in Bangladesh so you didn’t come to Bangladesh while pregnant and get stuck there when your pregnancy became high risk. Needing urgent processing after 2-3 years of being abroad versus needing urgent processing because you went on vacation while pregnant and became high risk and couldn’t fly home are viewed very differently. Do you have a home to return to in Ontario? A baby having colic doesn‘t necessarily mean that there is anything wrong with them and there is no true treatment for colic other than perhaps changing their diet and reflux medications that may help a bit. The babies cry for 3-6 months (9 months if really unlucky), make you feel like you are going to lose your mind and then eventually grow out of it. Things like the inability to put on any weight with crying would be concerning, vomiting a large portion of their food after every meal especially projectile vomiting would be concerning, etc. So would difficulty breathing, turning blue, high/low heart rates, murmurs, etc. all of which can be easily detected without fancy technology. If breastfeeding have you tried changing your diet to see if that impacts the crying, trying formula after that and then trying different types of formula if that doesn’t work. Those tend to be the first suggestions with a baby who may be colicky. When asking for urgent processing based on medical needs there typically needs to be a medical need identified by a doctor or what they are worried about that can’t be examined in Bangladesh. The embassy aren’t doctors or pharmacists so telling them what the baby’s current medications doesn’t mean anything without a diagnosis or a letter from the doctors about what they are concerned about and why the baby needs to be examined in Canada urgently. You can say that you would like to come back to Canada as soon as possible so that you have better access to healthcare for your child but there isn’t an severe medical or a baby in distress (which means life threatening urgent medical need) where you would have contacted sick kids in advance and go straight to the hospital from the airplane perhaps in an ambulance. You can also be honest and say that now that you are a mother and have a child to support you are anxious/need to return to school and work because I assume you are unable to support your child by working in Bangladesh. That you came to Bangladesh to help with a family matter in 2021 and fell pregnant and assume you hadn’t planned on remaining for 2-3 years. I would personally mention if you have a home and childcare to return to so there is no concern that you will be returning to Canada after multiple years with a baby and no home or funds.
Would also suggest joining a group online for mom’s with colicky babies to provide some support especially since it sounds like you may be a single parent. If you are needing daycare and especially subsidized daycare put you name on waitlists now in the hopes that you will eventually get a spot. There is high demand for limited spots.
As the mom explained in her first post that healthcare system in Bangladesh is extremely poor and due to political strikes it’s even tougher to take the baby to hospitals for even for regular checkups and vaccinations. This might be the reason for requesting urgent processing. Anyways, looks like the OP needs to include a letter explaining why she need urgent processing and provide documents to support the explanation.