Light pink blood day after sex?

Yesterday morning I had sex and we used a condom. I'm also on Nexplanon. We didn't do enough foreplay so the sex burned a lot around the opening. I didn't notice any blood then, but this morning I got some when I wiped. Could it be from the sex? Have you ever had that happen a day after sex? I'm really really scared it could be implantation bleeding despite being super protected. I'm going to try to get a test by next Friday. Please help!