<human>: Can you provide a brief rundown of the text in within 3 sentences?

So I interviewed for a position last week, and before the interview I saw online that the industry average for this position was $41,000. During the interview, they asked me my salary expectations, I said between $38,000 and $45,000 hoping it'd land somewhere in the middle. I received my offer today, and it was for $38,000. I can't help but wonder if I had just said $41,000 they probably would've offered it...

Anyways, so what I know is they are hiring 3 other people for this same position... I either got lucky and guessed exactly what salary they were planning on paying all of us to begin with, or we're all getting paid differently. As for the job, it is the ideal entry level position for me right now, and is a great company with benefits etc so I actually wouldn't mind working there for the 38k salary.

But it would be nice to get an even 40 at least, so my question is, is it common practice to negotiate salary after receiving an offer already? I also must say that I don't have any leverage as this is entry level and I would have probably still accepted had the offer been even as low as 30k. As such, I'm very afraid the offer may be retracted if I do try and negotiate, if that sort of thing happens?
<bot>: Said 38k to 45k salary expectation during interview, was offered 38k. Have no leverage, and overall its a great entry level position and company. Should I negotiate?