Hello... I have questions? anyone...

Ok, so I have a daughter she's 20 months. When we where taking the new baby classes they told us that we had a big possibility to get pregnant right away so to be careful.. Well, after we had the baby we would have sex but not come inside and I don't like condums so we just had to trust.. now I'm ready for my 2nd baby (this is the question) has any one got pregnant right away ? I mean last night was the first time he came in me as I had an orgasm after he was done he pulled out and I keep having orgasms one after another (I had like 3 ) is that normal for a person to have?? anyone pls help and pls do t be rude... I'm an older mom but to all this it doesn't mean I have all the answers to sex. 🤤😢😞