Hi Emily
Hope you can see my reply.
Before giving birth to my son, I was extremely unhappy about my last job. I resigned and felt VERY happy about that. After my son's birth and when he was older, I looked for jobs then realized because of the bad economy few ideal jobs in the market and the competition was strong.
Because we have a mortgage to pay and I need flexibility from my job as no parents around to help, I asked my previous boss if I could get my job back. Yes, I did and I felt VERY happy about it.
See the difference? Nothing outside has changed but myself.
I also believe it is true that if you are no happy about something, do something to change it, if you can not change it, change your attitude.
I was sensitive to the environment and people's reaction to me too. But then I figured out "So What?" I can be not happy, I have my attitude and rights too. Do not think too much about others, you are unique.
Best luck & take care.