Help! Im on academic probation? what are my chances?

Last quarter I was put on academic probation. But what seems really unfair for my gpa is that the two remedial classes that im am taking does not even count towards my gpa. See last fall quarter, I’m taking four classes: 2 four unit classes (both of these are my “completely-waste-of-time-and-energy” remedial classes), 1 five unit class (my science major), and 1 two unit class. So I have received an A-, C, D, A. Because I have a low grade in my five unit class (while my other two remedial classes doesn’t count toward my gpa because it is only a pass/fail class) I received an email from my school about it. One of my older siblings told me to not to stress too much about it and to not let my folks know about the probation (as she was also on probation before too at grad school), I signed the effing contract to stay above a 2.0 or at least to stay away from the 1.5 range in order not to get kicked out.
This time, winter quarter has gotten worse for me… I was taking all four classes: 2 five and six unit science classes (for my science major), 1 “part 2” of my remedial class taught by the same crazy English prof. that I am stuck with from the fall quarter (4 units) , and 1 college math class (4 units) with a prof. who teaching is very sloppy. I was at 19 units (I know a lot of work…) at first because I thought I might need college math class for one of my science classes as a requirement. Later on, I discovered that I don’t have to take it right away and begin to drop the class which reduces my total units to 15. Even with 15 units, I almost always feel like I am falling way behind of a lot of my classes. This is probably due to the facts that one of my classes will always require more attention than my other classes. There are some times where I have to lose hours of sleep because I have to study or complete assignments for other classes that I have due to lack of time. It seems like no matter how much I try to put my effort into accomplish things (whether possible or not), it never matters…. unless I am stroked with a learning disability….
Any ways I haven’t seen the results for my grade but I bet they are most likely going to be D, D, and C.
I do not know what went wrong with my studies….I don’t drink, I don’t go partying, I’m not dating, I don’t smoke and/or do any of the related stuff. I’m just trying to be a good egg and even that wasn’t good enough to make accomplishments.
Although I have taken three easier (non-stressful and non-suffocating) classes for the spring quarter, I’m not sure about my chances back at the university. At this point, I decided to not to take another science related class (but does it mean I’ll be in university for another five years? {I was going for four and I really don’t want to be graduating in five years unless I take classes during the summer}) I don’t know what to do. What do you think of my chances? Do I have a learning disability?