Omg, I am having the same problem as well. Do you know what I did?
Breats: So, the first thing you asked, hmm...breasts, so yeah, my breasts are budding and hurting really badly, when I was younger they were all flat now they are a bit more rounded shape, not as much as those 30 year old ladies on TV, but yes, a bit round. Anyways, get a bra. So, 10? Ur 10? Great news...so am I. Don't get a real bra yet. Get a shelf bra. Trust me, it really helps.
Periods: SO..I ALSO WANT MY PERIOD TO COME SOON!!!! So, what I think you should do is talk to your mom. Really, you should. That's what I did, and talking to someone about my excitement/worries on periods does help. It really does. I thought it would be embarrassing, but my mom actually helped me and she was glad I asked about periods!! Also, it could come anytime, so maybe later you should get pads. NOT tampons, (they hurt), but pads don't hurt.
Babies: It's okay to be curious about babies, I am too, me, rn, at the age of 10, wouldn't be so comfortable asking this question to anybody. But when I was like 6 I asked it. My parents explained the procces. Not too extremely but..a bit. I kinda forgot it now. But it's okay to ask your parents. It's better than to Google it. Trust me, don't Google it. It's what I did, and I found some NC-17 content.
Crushes: Ok, next, OMG, look-your not young to get a crush, do you know when I got my first crush? 7. I know it was so young. Now, I'm 10, and I still have crushes. My mom never talks to us about crushes, but, once I read this kids book, which turned out to be about crushes and cooties. Mom told me to stop reading it, I was like, "Why"?, she was like, "U girls are too young to be doing this lovey dovey stuff" And then I was like-"Too young? When will we be at the right age"? Then she was like, "When you are a teenager". So, no one can control there crushes though, right?
So, later, my sister wanted to watch this episode in a TV show where this 9 or 8 (i forgot) year old had a crush, and I was like, "Why'd u wanna watch that"? She was like, "Because I wanna see them get in trouble". Then I watched it, and instead of the mom in the TV show getting her daughter in trouble for having a crush, she said "It's ok if you have one". then my sister was like, "What? It's so bad that she has a crush. She should get in trouble "!!!! And mom was like, "She can't get her in trouble, crushes are just feelings, they are natural, she could say that you should think about this when you are older". So, it's okay to have one right now, my mom was a bit wrong and a bit right, but whoever you like, just leave them as friends.
My friends are waaaay early bloomers, they had their firsts when they were like 4 or 5, and...(whisper) their first kiss when they were 6. They still pretendly date people, but it's wrong. It's okay to have a crush, just leave them as friends for now.
Puberty for girls sucks. I mean like, boys? Nothing happens to them, their voice is just like-growing. It doesn't even hurt. A girl's puberty does. Also, I can see you hit puberty so, read all of these things, and make sure you are good and clean. Anyways, hope this helped. Bye.