Engineering (mechanical) and physical therapy are not all that unrelated if you think about, so you might want to reconsider. Or you could merge those interests somewhat and major in biomedical engineering.
Business and economics are useful majors that can lead into a vriety of interesting careers.
The hard sciences (chemistry, biology, math) are not of much use in the workforce unless you plan to get a graduate degree of some sort. But if you go to grad school, you can go into any number of interesting fields. One option with an undergrad science degree is patent law (what I do), though it is getting harder and harder to break into the field. Not to mention that being a lawyer is not all its cracked up to be (spend a few days with a lawyer to make sure you will enjoy the work before you decide that you want to enter the law)
Pharmacy is an interesting field, and there is more than one way to get in. If you don;t get into a 6 year program, go to a four year college, major in a science/pre-pharm program, and then go to pharmacy school afterwards. You might spend a bit more time in school, but you shouldn't rule out pharmacy if it what you want to do and the only problem is that you didn't get into a 6 year program.