Slip and fall cases in Texas can be very difficult to win. The biggest issue is finding some evidence of how the spill ended up on the floor and how long it had been there. Without this evidence, you will not survive summary judgment in Texas. I recommend first going to the emergency room if you are clearly injured. I would then contact a personal injury attorney in your area for a free consultation.
I agree with Daniel.
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The store is only responsible for dangerous conditions that it knew about or should have known about. That means the liguid had to have been on the floor long enough that the store should have found it. If the spil had just happened a few minutes earlier, then that would not have been enough time that the store should have seen it. Unfortunately, you are the one who has to prove how long it had been there. So there would have to be something about the condition of the spill that showed how old it was or there would have to be some evidence that someone else has reported it long enough ago. Most stores have video cameras, and that might help, but the store is not going to be cooperative in giving you information. If your injuries are severe enough, get a lawyer. Most important, get treatment. If you cannot afford care, go to the ER of the county hospital. There are ways to get care when you cannot afford it.
This is not legal advice. You should always discuss the specifics of your issue in person with an attorney. Be aware that there are time limits on all claims that depend on the kind of claim, so do not delay in seeking an attorney.