Did i drop the ball?

So I recent accepted a job offer without even negotiating.

Now it did fall within my salary range but I felt like I could have asked for more but I didn't because I was really in need of some thing.

Basically I was a runner up during the whole interview process, I was told someone else got it that was a little more qualified. About a week later manager contacts me again to go have lunch to discuss another opening that just opened up.

Chatted a bit and then verbally told me what my salary was and I only thought about it for about 15 seconds and just accepted it without asking for more.

Could I have asked for more at that point?