advice - in laws (long!!)

Shannon
I'm looking to you moms for some advice. I need to know if I'm crazy or if my feelings are rational.
I feel like my husbands mom and dad are claiming my son as theirs...
I'm married to an only child, adored by his parents. We've had our ups and downs and overcome each setback.
I had our first baby 9 weeks ago and although his parents weren't supposed to be at the hospital, they turned up. Which didn't bother me at the time.
My FIL bought my MIL the new baby (boy!) pandora charm and I feel like if anyone was going to have the new baby boy charm it would be me.
Ive had to put up with 9 weeks of photo demands and if I ignore them, I get messages in other ways. Example: I'll get a whatsapp, then a text, then a Facebook message then a call. If I ignore all them, I get a message asking how I am, how my husband is and if I respond, I'll get a "pic please"
They want to see him every weekend and they call MY little family THEIR little family. My MIL now has my son's initial charm. 
It was our wedding anniversary weekend and they wanted to join cause I wouldn't let my son stay with anyone else but us.
We were at a wedding, our first outing as a family, very special as its his godparents, and for weeks, said they'd babysit even though he's 9 weeks and I'm not ready. The even part of the wedding, they had their backs turned to guests on the table - I wish I was exaggerating this but I'm not - so they could stare into my sons pram.
He got upset cause of the loud music and I took him away and they disappeared for 40  minutes, didn't bother coming back to the party and I felt like it was because I took my son away from them cause he was upset.
They want to open up a savings account and be in control of it. Whenever they want to see him, I try and change the day so I can feel like I have some choice and then I get called and cornered into the days that suit them.
I understand their excitement and I love that they adore my baby but I feel so overwhelmed. My family barely see him and they live closer to us.
I don't put pictures of my son up on Facebook and my MIL did, blaming it as an easy mistake. 
I have my birthday coming up and they want to spend it with me, which is nice but because I've made plans with my family they've sulked. No literally, I had a message, we're sulking cause we're not seeing little man.
I've told my husband about all of this and he has said he's told his dad to back off but it hasn't worked. 
It's little things adding up and making me go stir crazy.
Yet when I'm feeling bad and send them a ridiculous amount of photos to make up for it, they ignore me?
My son was 5 days old when they started questioning me as to when I'd have another. Then they tell EVERYONE how they're taking him to Disneyworld when he's 3 and by then I'll have a little girl.
It's put me off having another but I know if I can have another I would love one, be it boy or girl.
I just don't know how to cope. I had a shit pregnancy and an emergency c section. The hospital said my son would have all these health problems and be small and underweight and he wasn't. As a new mom I'm learning to adjust to being a new mom.
I feel like it's me and not them. I feel like
I'm going crazy!
I just need to know that I'm either not alone in this or I am going crazy and need to try and relax