Here is another thought of mine. It seems we have two issues here. How your mother reacted to something she found in your room. Also it came out that your father has passed away. Honestly I don't think her anger is directed at you fully. I think its just coming across that way. I am sure for a fact she is angry with your choices. Parents are like that. You have to understand she is now dealing with this alone. What would have been minor anger before you father passed away is now going to be full blown anger. She lost her partner. No one to talk this over with and no one to turn to when she is afraid. I truly think if you can get her to open up the communication on these feelings it will be good for you both. You can explain your stress with work and school also. You only have each other now. You have to talk. If you keep letting her be angry and silent where will that get you? Just a bigger wedge between you both. She needs you just as much as you need her right now. If you can break that barrier I think you might be surprised how much the conversation will flow.