One, failure is not fatal. Two, even if you have to drop, dropping is not failure but gives you a chance to regroup to figure things out moving forward.

I did have an advisor once say that it can be better to go through a class to get exposed to it even with a less than desirable outcome than to drop it because by being exposed to the material the first time, it is less you will have to pick up the second time around and also there may be hope of salvaging it that it may not turn out as bad as you think in the end. Talk to the professor. See if there is help available, such tutors, or other students can work with.

If you are going into a field where the end grade matters such as going on for higher education beyond this, or for financial aid to stay off probation, or to stay in a program, dropping may be necessary. Check first to see if dropping (to lower hours) versus a low/failing grade will affect your status in these areas in any way before deciding.

No matter which is the best option for you, do what is best for you sanity. Hang in there and good luck!