Worried😣

Amy
My last period was the 26th of feb to the 2nd of march . According to glow i was due to start my period on the 30th of march and still nothing. I have done quite a few pregnancy tests all negitive been to doctors they have said to send a urine sample in when im 2 weeks late which is tomorrow the 12.04.17 which i am going to. Iv felt sick and been sick few cramps on and off but dont feel like periof cramps around my nipples are a little sensitive. I do have pcos and im starting to get a bit worried now. Can someone give me some advice or ha e they been through this and what was the result