.... help a girl out

so I used to used cheap opks from Amazon and had never gotten a positive test so decided to switch to the easy at home opks this month. I’ve finally I believe anyway lol have gotten my positive or it’s very very close, I’ve also just had some fertile discharge will attach the picture. I had sex yesterday morning and planning on tonight once I’ve finished work, what are my chances on getting pregnant? Will it make a difference having to wait until later