These videos are pretty helpful: The Calculus Lifesaver. You may want to get the book as well, and support the creator; it's very reasonably priced (and no, I'm not Adrian Banner).
Also check out MIT's Open CourseWare for Single Variable Calculus. I found the professor to be much drier than Banner's videos, but that is more personal preference than anything. Their course system has it's own study group to ask questions, but of course you can also just post well-crafted questions here. A lot of their materials are available online, so you may be able to just use your own book to supplement it. If you do need their book, however, it's much pricer than Banner's.
With regard to your more general question, "can I catch up", the answer is most assuredly "yes", but in the sense that you will have to be willing to put in the time and effort. Math, perhaps more than most other subjects, builds on itself; each step you take in Calculus is secure and firm because you've carefully laid the foundation before it. You are now in a position where most of what you will come across in your book will require previous results, and if you are not familiar or comfortable with those results then it will be on you to go back and solidify your knowledge.