What should I do??

[Lindsey]

Okay, so most of you know I will be graduating from college in December, and last year I had my work term with a company that I didn't like a whole lot, mostly because of the people I worked with. I e-mailed my old boss for a reference a week and a half ago, and haven't gotten a reply.
This morning I went to school and there was a message for me from the Co-operative Education office, telling me to call the lab manager of a different office than the one I worked in, but he's pretty much is the head manager of all the labs because he knows EVERYTHING.
So I just got off the phone with him, and basically they want me back bad. I told him I haven't made a decision yet, and that I tried to get ahold of my old office manager but never got a reply, and it turns out that's because he's farming right now. He asked which city I plan to move to, and if I would consider going back to the company (so I can have a job in any city I want to go to!). I told him I'm not interested in just doing lab work because it would be a step back from what I've learned this year being able to design and stuff. He asked what I would like to do and I said I would be interested in helping with design work and drafting, and I'm not sure if that opportunity would be open for me at the company. He told me he would definitely look into it at the office I had been working at, and that he would give my contact information to them to call me as well.
It also turns out that most of the people I had troubles with last year, except for one, have all left the company. On top of that, another girl who worked at a different office last year and didn't like it at all has apparently already accepted their offer for next year. It makes me wonder if maybe they have upped the pay and benefits, and if I should give them a second chance.
Ahhhh I really don't know what to do about this. Last year they hired a new engineer while I was working there, and they told her she would just be getting used to how the lab runs, and then she would get straight into engineering work. Well, she was working under me in the lab for 4 months, and that's when I left to come back to school. So they have a tendency to tell you what you want to hear so that you work for them I think...
And finally, I just had x-rays taken of my back earlier today. Hopefully it's nothing too bad, but if there's something wrong there it would definitely prohibit me being able to work in the lab at all. Even if I was doing drafting and design, I would be expected to help out in the lab during heavy construction times. I guess I'll have to talk that over with them when they contact me.