period 11 days late

hi everyone. so I have been tracking my period for about 3 years. and the app is pretty accurate. my period usually comes within 2-5 days either way of when it's predicted. I am very imtune with my body and can tell when I ovulate most months and when I am going to get my period. unusually get slight cramps and bloating a few days before it shows up and it last about 4 days.ever since I changed my diet it has been usually pain free and minimal bleeding. unless I go overboard with eating too much sugar or processes food the month before then the cramps are worse and last longer. sorry if TMI. But now I am 11 days late and I am worried I might be pregnant. I have no signs of my period coming. I was only slightly bloated for a couple days after I ate. I have take 3 pregnancy tests and they all came up negative. so should I wait longer to take another test or not? I have only been woth one partner my entire life. we use condoms as contraceptive. thanks. I hope everyone had a wonderful holiday and are doing well.