I remember these feelings from when DD was tiny, she is now 2.8 and I am fully relaxed about control of her. Ok, I say "fully" ...
maybe i mean fairly 
DS is 4 months and I really felt that I was more relaxed this time.
He is an easier baby too which helps. DD cried all of the time and only seemed soothed by me. DS is quite the flirt 
Anyway he spent last night at his grandparents, my inlaws. V kind of them and am grateful. Was their idea rather than our request.
I left a long list of instructions. Times to feed/nap etc. It has taken me 4 months to get him in to a routine, hard work but finally there and essential (in my opinion) for the days when I have both kids (4 days a week now).
Anyway, we called en route to collet the kids and ds was asleep and had been for at least an hour or more, which means an hour and a half before his scheduled nap.
I am calm now and actually feel a bit silly now as I like my inlaws and it was kind of them. However I was furious and made DH stop the car. I got out and spent the next 2 hours just walking around waiting for him to politely collect them and come away (had planned to spend all afternoon together).
I was sobbing initially (more in frustration as felt my entire requests had been disregarded, in a "we know better" fashion) I felt sick, felt that I wanted my son back asap, felt angry with DH for not saying "why is he asleep" and for not 'siding' with me.
I genuinely think I could accept half an hours flexiility here or there but its taken so long to get his feeds and sleeps to fit with DD's day, and it really suits him. As a consequence of their early nap today he has ended up upset and having to go to bed an hour earlier than normal tonight, so its me that will deal with the repercusions of that in the morning.
I feel unreasonable in that if I stand back I think its ungrateful of me. Its not the end of the world etc etc ... but I feel I lost control and now I dont want anyone else to have him. DH says ridiculous.
I remember feeling like this from time to time for the first year with DD, maybe its an hormonal thing or have I gone crazy???