tell me if I'm overreacting please

So my son is 4 months old, before he was born I had a good relationship with my MIL. She loves kids is good with them but recently her behavior has been annoying me, it's like she thinks I don't know how to look after my son. So here's a few examples.

-I will come into her house with my son and she will pick him up and say "oh he is saturated where's his change of clothes?" Now he's teething so he's drooling like crazy so of course he's gona be a bit wet. He certainly isn't saturated!

-his bibs are the biggest issue, if his bib is even slightly wet (he wears one all day long apart from when he's sleeping) she will demand another bib for him. I carry about 3 in my changing bag when I go anywhere but they always run out. She makes a point of going on about these bibs every time I see her, the other day she said "I'll pick him up a packet of bibs when I'm out" I said "thanks but there's no need he has about 20 of them" and she said "and never enough" I was so angry!

-we have started him on solid foods, just giving him about half of a small jar a day and he's loves it! He wants more but I don't want to overwhelm him. She will talk about him eating solids all the time constantly telling me "u know not to give him too much"

-she had the nerve to ask me the other day "do you change his clothes every day?" Of course I do!!!

-she will hold him and talk to him if he's crying a bit and say "what did your mummy do to you today, what did she do to you" what does that even mean.

- I change his nappy very regularly but she will always ask "does he need changed" I'll say not really but u can check. And she will take his nappy off and it will be hardly wet at all and she will be like "oh your saturated, it must be horrible sitting in that nappy for so long" he was literally changes 15 minutes before!

Sorry about my post being so long but how would you react to this? Am I being crazy? I tried to talk to my husband about it and he got so angry, started an argument and told me to stop slagging off his mum.