Ate grapefruit despite taking medication?

Hello, I take two blood pressure tablets every day, one in the morning and one in the evening. Enapril/lercanidipine. I took the first one this morning at 10 am, about 8.5 hours ago, but I haven't taken the second one yet. About 45 minutes ago, I ate a salad with grapefruit in it. If I had to estimate, it would be about this much: if you quartered a grapefruit, it would be no more than half of a quarter. It was about two pieces of grapefruit, each 3cm in diameter. I have no idea. Should I be worried, or is that too little?