I was suppose to start my period on December 16th. I have never had irregular periods or even started late. My cycle is exactly 30 days. I did have unprotected sex several times during the end of november and all throughout december. I havent had to many common pregnancy symptoms. Although i have experienced alot of strange sensations in my lower abdomen, ill get a cramping feeling followed by a feeling of intense pressure. My breasts also seem a little swollen and my apetite has increased and then when i do eat i feel nauseated:( Does this sound like pregnancy??? Im skeptical because of the negative pregnancy tests results but i know that sometimes the hcg hormone isnt released untill later in the pregnancy it depends on the person. If anyone has any feedback please let me know! Thanks!!!:)

I know this is an old post but i am answering anyway.I am 18 days late too. My first child I was 8 weeks before I had a positive test.

I am also 18 days late and have had several negative urine tests. I am waiting on a blood test I had today. I'm not sure what to think. I am supposed to have my results back in two days. They are also checking my thyroid and glucose levels.