I realize this is probably a bizarre situation and I apologize if I'm not the first to experience this, but I felt as though I might as well post... Basically, I had committed to give a decision (via e-mail) on a PhD program in the Humanities (specifically in the languages) by yesterday, April 7; I was deciding between two programs, and ultimately accepted an offer given that, over the weekend, I was informed that I had received a first-year fellowship worth +4,000 which relieves me of any obligation to teach over that first year. However, since sending the e-mail I strongly feel that I've made the wrong decision (I agonize over such things anyway, but I've never felt so badly about a decision I've made). Essentially, I've looked again at course offerings and haven't found that those at the institution I've accepted are more broad/have greater breadth than the ones at the other program (despite my whole argument when deciding being 'well, this program is more traditional, will offer me a better foundation, etc.'); the program I haven't notified yet has had two recent placements in prestigious institutions compared to the program I accepted, which has had fairly modest placements; and the offerings in terms of work outside the department/graduate minors aren't as impressive. My logic was that the program I accepted didn't have the one professor I wanted to work with in the other program, but had two more faculty (including one in my period of interest) and would therefore offer me a broader grounding. Yet course offerings are fairly standard, and I'm not impressed by what's offered outside the department. I realize it's ridiculous that I've just now thought of all of this but I feel physically ill - as if the only reason I decided on the program in question was because they offered me the first-year fellowship, which, while a huge help in terms of not having to teach for a year, shouldn't have been what I based my decision on. Given that I've accepted via e-mail but not yet signed any documents, and only a day has elapsed, could I withdraw my acceptance without coming across as utterly unprofessional?
Obviously I don't want to give details on a public forum but if someone wants to talk via PM I could give more information.
Many thanks.