strange feeling

I've had a weird feeling since my ovulation. After it passed, I've had this dull ache in my belly every day, and I feel more things happening in my stomach than usual. It feels like implantation pain but different. According to the calculation, implantation should happen on Thursday. Could it finally be a hit then? And I have another problem: my boyfriend wants to go to Bellewaerde tomorrow. What if there's already been fertilization? Could that be harmful?