Any advice?

I'm a 26 year old woman and just earned my phd in computational physics. Now that I'm done with schooling my family is pressuring me to settle down, get married, have kids, etc. I don't want to have kids right now and probably never will and I'm not interested in romantic relationships or marriage. I'm feeling really conflicted because I feel like I have an obligation to my family and don't want to disappoint them. I'm also worried about the stigma surrounding single childless women. Any advice? Thanks