I'm going to the dentist tomorrow?!

Let me just tell you, you have nothing to worry about. It's nothing compared to what I'm going through.

First of all, When you get your tooth pulled out, ask for the needle. Although that sounds nuts, I'll tell you why. When you have the area locally sprayed with numbing spray, it's fine, you're all 'yay! no needles!' but, you'll feel pressure in the area, freezing and pulsing. All kinds of weird uncomfortable things.
Numbing with a needle is best. And because the skin in your mouth is different from the skin on your arm, you will barely feel the needle go in. And, if you don't want to feel the needle AT ALL, ask your dentist politely if he could use the numbing gel on the area before he uses the needle. The gel numbs the skin so you don't feel the needle go in. How great is that?
And yes, I went through the whole gel and needle process. And it was very soothing. I didn't feel a thing. I just sat there, thinking about next weekend's plans.
It is your choice, but remember, using the spray will get you out of using the needle, but I wouldn't go through pressure and aches just for that. Especially if your dentist uses the gel before the needle. Either way, it's an easy process. Especially for a baby tooth, those things are a breeze to remove!
What to do when getting the tooth pulled:
Go in, sit on the chair, and relax. Calm the butterflies in your stomach, and take deep breaths. Smile, and look as relaxed as possible. Politely ask the dentist what he plans on doing today. Tell him you heard of the two options: gel and needle or spray. Ask him his opinion on which is better, and decide for yourself. If you chose the needle, relax all your muscles. He'll put the gel on. Think only positive thoughts as he does. After a few minutes, he'll bring the needle. Close your eyes, and think of anything else but the needle. It sounds hard, but really isn't. And before your mind decides to focus on the needle, it'll be over. A few seconds and that's it!
If you chose the spray, I don't have much to say. It might be a little uncomfortable.
The length of that process, it depends.

As for sealants, it's even easier than the already easy baby tooth pulling process. Your molars have deep crevasses, where food gets stuck. And sometime, the tiniest crumbs can make the biggest cavity disaster. So, Sealants are put in! Your dentist will start by cleaning your teeth really really well. Then, he'll put a paste (sort of like toothpaste) on your molar. He'll take a blue light, and put it close to the tooth for a few seconds. This special light, hardens the past, and turns it to hard tooth texture. He'll ask you to bite down and tell him how it feels. If it feels too bumpy and thick, he'll scrape it down. It doesn't hurt at all. In fact, I enjoyed having my sealants put in.
Again, the time depends.

Hope I helped, Good luck, and believe me, you have the EASIEST appointment tomorrow. I'm having a tough time right now. Wish ME luck.

:)

All the Best,

Mandy <3

Experience. You'll be fine! It's the easiest appointment ever!