Hey guys, Please help
I am worried about 2 things, both with a different nature attached.
I am 18 years old and was a virgin until last night, when I had sex with my girlfriend. I don't regret it and I loved it. But I am worried and would like a confirmation or something to settle myself.
First thing; My girlfriend is on the pill at the moment, and shes had sex before. Last night I was, i think, TOO happy to get down there, I didn't have a condom but we still went ahead anyways. Now she just had her period about a week or less ago. Usually this didn't concern me until I was reading through about pre-cum. I am very worried, can anyone confirm for me that there is no way she could have gotten pregnant based on the information I have provided. If there is anything I have missed please ask to provide more.
Second thing; Having sex for the first time...I wasn't nervous so to speak...well I didn't feel it. But for some reason I couldn't last 30 secs before wanting to cum really hard. If it got to that point I would either stop or pull out, but it really started to bug me, when I saw that I think she was enjoying it but I pulled out or stopped.
Shes great, she understood that it was my first..and that I should stop beating myself up about it, but seriously.....What the hell? Is there anything that can prolong me from wanting to cum or cumming so quick? I just can't help feeling like i've let her down.
Thanks for reading, if anyone can, please help me

I would really appreciate it.