Opinions, and personal experiences needed!!

Okay so I bought a vibrator about a week ago and today I used it for the second this time went WAY better than the last time BUT idk like idk if I climaxed or was almost there. I did it in the shower and the vibrator also comes with clit stimulation (AMAZING). I was in there for about an hour and idk like whenever I would touch a good spot around my clit my toes would curl and my back would arch and eventually I’d let it sit there for a while but then my body would tense up so much that I’d have to move it.... then I’d go in and out with my vibrator in general since that part is kinda “dildo” like and I knew I was hitting my g spot BUT I would get this feeling like i had to pee. What is that?! 😂 anyway if anyone can be helpful and explain I’d appreciate it lol also how do you know when your climaxing and how long does it take you Guys to climax since I know everyone is different.