Is this probably an std

I have frequent urination, sometimes burning, and an intense urge to go even when theres only a couple drops / nothing at all. Sex is painful and burns so badly afterwards. I have pressure in my lower abdomen sometimes. I went to the doctor they told me my test came back normal I have no uti? Could this be a sign of an std? I’m pregnant btw and my boyfriend had chlamidiya before we got together but also got it treated he told me. No vaginal itching or anything. Just not sure what it could be I’ve been dealing with this for over a month now it just keeps getting worse and I’m miserable.