Really Really New at Competitive Swimming

and I wanted to ask a few questions. I got into this in September (yep, three months ago) because I was interested in losing weight as well as learning a bit of what my son (who is on a club team) goes through. I've always loved swimming. I honestly had no intention of competing and I still feel kind of... unsure about it. I'm not the fastest, I certainly don't have a ton of endurance. So, I guess I'm asking, if you started late (and judging from what I've read here, I am) when do you break through? During practice, quite often, I feel as though if I'm asked to swim another lap, I might go crazy. And I feel like I don't belong there. There are other people on the team that I just :notworthy: to because they rock. I've been telling myself that even if I feel like I can't go another yard, push myself to keep going. But the other part of me just says, heck no! I don't have to do anything I don't want to do. It's like the good angel, bad angel. Although, the good angel is winning lately. Suggestions to get past that mental block I seem to have? It would be appreciated. Thanks for reading. Lisa