I have seaweed in a cut on my foot, what do I do?

I tripped by a lake, and cut my foot on the pier. It's a really small cut. About a centimeter long. It's not too deep either. The thing is, I got seaweed in it. There was kind of a lot. I tried to get as much out as I could with like a toothpick and water... But there is a small chunk a little bigger than a splinter. I can't get it out. I put rubbing alcohol and neosporin on it. Will I be fine? Or is there more I should do?