Great Feeling

So I have a great feeling about this month that we did it bc I have EWCM on the 15th and it was the first time EVER that I could tell I was ovulating. We BD on the 14th and now I am 10 DPO and my boobs are sore, my appetite has increased, my back has been sore, and my urination is my frequent. I am so excited to take a test but I have a question.

I have irregular cycles and my next one is not due until April and I KNOW I can't wait that long. So how many DPO can I test and get an accurate answer?

Thank you ladies!