Stomach shakes while using toy

I am scared dr said clean toys are ok since i cant actually get off with partner because of pain with the ab workout it entales. Well i just used a toy and my whole stomach started contracting really fast and after i took out toy to clean up there was brownish red blood....anyone else? Am i crazy i hope i didnt cause any issues with my baby! I feel so guilty and am scared now... if this has happened to you please share!