Negative result yet pregnant?

I'm so confused girls! I've taken two tests which were negative, went to the doctor for pain down there and they did one and it was negative but they've told me that my discharge and cervix is the exact same as a pregnant woman's and all the symptoms are there. My tummy is hard, my boobs are sore, I'm feeling sick, I've got headaches and I feel sick after smoking! I'm showing all the signs for being pregnant but don't have a positive result, what do I do?😭