I’m a doctor but I won’t diagnose online or give an opinion as a professional. I’ll share my own experience as a mother. There’s no test with 100% accuracy, there’s always 0,000000001 chance. However when all the test shown negative (especially the blood test), “MOST LIKELY” you are not pregnant. I got that 0,000000001 chance fortunately:). My period was late(my 28days circle always ontime since teenage), I’ve waited till 7 days before took the clear blue pregnancy test, and came up negative. I’m still curious, so I did the blood test, it’s also came up negative. But, deep down inside my heart, I can feel that I’m pregnant hehe. All the facts that the results came back negative to be honest made me think deeply. There’s something wrong with my body that I need to find out. I started to check every possibilities why my cycle was interrupted. I kept my life as healthy as possible. Because there’s no visible symptoms or problems related to gynaecology, I don’t want to be stressed or bothered too much. The 2nd weeks.. still no sign of period, I took another urine test and blood test. Both came back negative... Oh well, I Talked to my OBGYN by the phone to get second opinion LOL, after discussed, bot of us agreed if after 3weeks there’s no sign of period, I’ll get pap smears and USG, we didn’t thinks that medication to induce the period are necessary based on my medical record. We opt to check everything inside first before started any treatment. Finally, 3rd week... no sign of period but i started super sensitive with scents and odours, sleepy all the time and a bit temperamental hehehe. I took urine test and blood test(again).. this time it’s came up positive with 4 weeks estimated pregnancy(urine test) and high level of hCG(blood test). I ran to my OBGyn to get ultrasound, and yes.. my little “Blip” was there. He was 6W1D old . My hCG and hormones level didn’t raised as fast as most of the women apparently. He is 11months old now, a happy and healthy little boy. So, yes.. be healthy as possible, and do get second opinion. Make sure you get everything checked thoroughly first before starting any medication, because it can be anything, from pregnancy,PCOS,stress,pituitary tumor, etc etc. I wish you a good luck . Sorry for the super long comment.