Is he masturbating behind my back? TMI

I have no problem if he does it, but the fact he goes behind my back about it is what upsets me. We have an amazing sex life, until a couple of days ago he was unable to get hard... he was blaming it on me with the fact that I didn't seem interested although I initiated it, we were kissing, and I was jacking him at the time? So he fast forward, I felt his hand beneath the covers moving around in that area. I know because I rolled over and went to reach for his hand to pull him closer. So when I confronted and asked him he got incredibly self defensive, says he never touches himself because he has me instead?

Long story short he went to work after showering, he had to rush because he was late. I got up to use the bathroom and then I see this in the toilet:

Now I'm not being funny but that looks like semen to me? We're also trying for a baby and today is my ovulation date and I just feel so hurt by it. Also, we even had sex last night! 😪

I don't care if he does it I just want him to be open and honest with me, and be a little respectful if we're trying for a child together.

What do you guys think? Is it what I think it is? Should I confront him? 😞