First time letting a man ejaculate in you.

I'm really so curious because my experience was weird. Can you ladies tell me how you felt after a man first ejaculated in you? How did you feel that week or two? Did you have any symptoms like "headaches , .. Etc" I just heard some women felt different once that happened to them. Like they would feel sick , that week or the following. Like their body's reacted to the sperm I guess. I hope this makes sense . I'm really asking a dumbass question haha. But Thank you ladies so much!