What happens if the waves keep on pulling me back to the sea?

Most of the time, waves will be pushing you toward the shore. Water pushed shoreward by waves has gravity encouraging it to go back out, so rip currents form. There's plenty of online advice for rips; in the US, check the National Weather Service, which provides rip current advisories and safety information. Most rip currents don't go too far, but they can be fast, so don't try to swim against the current. If you want to get out of the current, try swimming at a right angle to it. Or ride it out till it dissipates. Or request help.