While tribiguy is correct about making preparations to leave, it is much easier if you can complete your school without the added pressures of living completely independently. You will have enough debt when you graduate and it is hard to get the loans in place to support independent living half way through the year.
It has been awhile now, and it sounds like things have settled a little. I would be tempted to confront the situation now (or soon) directly for your own peace of mind. As it stands, it sounds as though you don't know if you have a job, a car or a place to live.
I would sit your parents down and calmly tell them that you have done some searching and have found alternatives to living at home while you finish your courses but that it will take a week or two before arrangements can be made. Basically, offer to leave. This accomplishes a number of things. It tells your parents that you respect them enough to take the words "you will have to leave" to heart. If they would let you stay because they thought that you had no place to go and allowed you to remain strictly out of guilt it might lead to a power imbalance (they believe that you are 100% dependent on them.) It also means that they would be able play the saints even while openly despising you and / or your orientation ("look at how kind we are allowing our gay son to remain at home so he can have a future.")
The last two objectives that this accomplishes are that they can retreat without "loosing face". They can tell you that they have reconsidered and had time to think about it and are happy to have you remain while you attend school (and allows further discussion on any questions or concerns or rules such as "no boyfriends shall set foot in this house.") Finally, it takes the threat away one way or the other. Either you need to get busy and actively pursue the options that you found and start moving or you have a roof over your head with your family for awhile longer... no more wondering.
Whether they wish for you to leave or remain it can only be good for your relationship. There will be no hidden resentment on either side. If you just keep living there they may allow it but resent your remaining. If you are asked to leave you have the choice of being openly upset (and rightfully so) or continuing on trying to salvage whatever relationship you can with your parents.
Best of luck, and please do continue to keep us posted.