Could my climbing on something hurt the baby in any way - Previous question deleted?

know this sounds like a weird question, but I am a worrier as some of you know. The other night I was climbing into bed on the end where the wood is and since it wasnt the matress part it didnt give like I am used to and it felt like I was pulling a muscle in my upper stomache and upper leg areas. What I was wondering is there any way I could tear something inside around the baby if I was strained so bad it pulled that hard on my muscles? I just want to make sure that the placenta couldnt tear away or rip or anything like that. I have no immediate reason for concern other than my worrying. I am 17weeks 1day if it helps. Thanks for your help.