Help please.. Change in CM

So I've notice a change in the way my CM smells (sorry tmi).. It doesn't necessarily smell bad just different.. I'm not itchy at all down there.. My bf noticed after we have sex it smelled different.. I'm not sure what it could be .. My CM is like a egg white constancy.. No clumps. No started using summers <a href="">eve</a>, but stopped but didn't really feel comfortable using .. I've never had this happen before.. Any suggestions on what it could be .. Please help!! I'm nervous.. I going to get STD tested today ( just in case) ..