It's not impossible for a woman to get an std if she's married cos her other half might not have been faithful and passed it to her..
Best to see ur doctor asap to get a professional opinion, nothing to be embarassed about, if u don't ur just going to keep worrying and worrying and it might be something that can be dealt with easily if treated early, there are certain stds that can cause a woman to become infertile so I'm not exaggerating when I say u need to see a doctor quickly.