(Please forgive my English, it's not my first language)
I (37M) have sex with my GF (38F). She's the first I've had (We live in a conservative country), anyway, she was married before and got divorced. She always told me that she's never had any orgasm with her ex, and after about 5 years, when she was in the EU, she went to a physician and that, she, (the physician). told her about exploring her body, masturbating, etc. After that, the only way for her to orgasm was through rubbing her clitoris.
Our sex routine is lots and lots of kissing, tits sucking, neck kisses, and then rubbing her clit till she has an orgasm, then I'd penetrate her, change positions several times, then start rubbing her clit once more until she has a second orgasm, then take couple of minutes break till she collect her breath then penetrate her again till I finish. She doesn't like me giving her oral, she says that she doesn't feel it (even when I suck on her clit hard, and lick hard) she says only the hand do the trick for her. Also, we tried to massage the G-spot area, but she gets a feeling like she's going to pee. I told her several times to ride the feeling, but she gets uncomfortable and says she doesn't like the feeling, so I don't push it.
For context I'm very average in size or even below average I think at 15 cm (5.11 inches) so most positions are good for us, except pronebone for example where I can't reach her cause she as a great ass and I can't reach.
Normally her orgasms are very strong and shakes her whole body, and she closes her legs, one time I had a finger inside her while she was having an orgasm and her vagina was pulsating and really tight around it. and she keeps shaking for like 20 to 30 seconds even sometimes when it's strong she has trouble breathing during the shaking.
Couple of nights ago, when we were in the doggystyle position, (I didn't change my angle or anything) suddenly I felt her vagina contract on my shaft (for context I never feel her walls on me while penetrating, I don't know it I have death grip syndrome or whatever it's called, or I'm just small) anyway, this time I felt it contract and hold me for sometime and she shake for about 10 seconds. It didn't seem like her normal orgasm, she kept giggling and say this is nice, I don't know if that was an orgasm or not?! its very small to be. Then I withdrew and gave her an orgasm rubbing her clit. Then she rode me and was rocking back and forth and this happened again, I felt her vagina grap me so tight (tighter than the first time) and she shake for about 10 seconds as well and she collapsed on me and kept kissing me and giggling saying I got better.
I don't know what happened, I asked her and she said she doesn't know either, but she loved it and we should do it again. I didn't push her to speak more as honestly I don't want to appear this inexperienced (I know it's stupid but I'm being honest here)
Was this an orgasm? If so, why was it smaller than what she regularly has? Also, isn't the clitoris the organ responsible for oragasms? can she have an orgasm without rubbing it?