When to start TTC? (27 yo, Married for 4 years, just had IUD, graduating nursing school in December 2015)

First thanks to anyone who reads and responds this. 
I have been internally freaking out that I just had my IUD removed because me and hubby want to start TTC soon. Now that it's out, I'm avoiding him because so many things are running through my mind. 
First concern, I graduate my nursing program in December 2015 where I will have 12 hour clinical days once every week for about 14 weeks. It's very important that I'm not too far along so I can manage the 12 hour clinical days in the ER and critical care units and finish my degree. So scared that something may go wrong. 
Secondly, I'm concerned if I even have a chance to send my resume or attend interviews for employment after graduation and passing my boards, or will I have to wait until 2 months post baby delivery (which could easily be July of 2016 before I start working). 
Thirdly, as my doctor stated there's only a 3% chance that something can go wrong with me and my future pregnancy since I've had a Leep Procedure done on my cervix in the past. He said not to worry, but my nursing mind is like if complication occur that's a cerclage and/or bed rest... (Thinking too much!)
Okay, anyways. 
I love the idea of starting a family with my husband and do get excited but the reality of my concerns listed above it really has me thinking about everything. 
I've never been pregnant so really don't know what to expect. I figured it would be best to have baby #1 before I really start working as a nurse, because from what I hear the first year of working as a grad nurse is very stressful and tense. 
Well, that's it. Sorry for the lonnngggg story...  I would appreciate any advice on the matter. 
(OBGYN says I'm healthy and all looks good down there), but it's still hard to not worry.
Tia! 😀