It could be the source of the material you have to study that is not working for you too. I had Hein & Best in my first year of College then Ternay, I was much more comfortable with Ternay - even though it was it was advanced level coursework. The lab was not restricted to easier problems but instead went to the most difficult of conceptual issues and applications. That made the tests easier to pass.
Then a few years ago I had to take some refresher courses to advance my degree. They didn't allow credits for some classes if the time that had passed were more than ten years {this has changed}.
The first College instructor prefered Petruchi for General Chem. The Second chose Chang and I felt it was geared toward the chemistry major rather than a Physics major. McMurry was the Organic reference of choice and it was well written as well.
The Instructors' choice of material will be dependant on 1} personal preference. 2} The prime major coursework of that Universities' Science Department. 3} Sometimes even the Instructors sponsoring Dr. wrote the book - sometimes helpful and sometimes not.
If you really like Chemistry and think it's for you, go to your strength's. Math is your right arm - Mechanical/Chemical Engineering schools may fit you best.
Not so ? Biology/Chemical Engineering could be a better fit.
Feel free to disagree though with my observations though, the instructor still can make up for your problems and friends will be better at helping you get through it many times too.
Good luck and have a nice day.