Hi Sweetie,
Bless you, I am sure you're doing a fantastic job.
I can't imagine how difficult it must be for you at times when you need reassurance and want it from someone who isn't there to give it.
The way you've worded your post shows you are obviously a very caring mum and just want to do things right by your lo.
Do you have anyone else around you that you're close to (family or friends) who could give you some support? I know it's not the same but you sound like you eed some reassurance.
What about your health visitor? Do you have any contact with them? They may be able to help steer you in the right direction if you have any worries or problems...
Take care, sending you a big hug...x