Some expertise would be lovely

I am currently 3 days late. I have slight mild cramps off and on sore breast and so forth. All common signs for me for af to show. Also, all common signs I have as early pregnancy symptoms. I do have irregular periods, but, there usually never this late maybe a day or 2, but, not 3. I just had my first cycle back after my d&c back in may. Is my body possibly just still thrown off from it? That was my first time having a miscarriage. So not so sure how the body really works afterwards. I have taken pregnancy test recently and they all seem negative. With my 2 kiddos I got blaring positives on the day of expected period. I also, got one on the day of expected period of the pregnancy that lead to miscarriage. So I'm so confused right now.