Late on period

I had my last period on the 16th of last month and I haven’t had a period this month Iv been having unprotected sex since my last period my belly is bloated witch I would be like that a couple of days before I get my period but they still haven’t came Iv no pregnancy symptoms but I haven’t took a test yet, my periods r sometimes regular but I can be sometimes late I’m not exactly sure if I’m a 28 or 30day cycle either

My last pregnancy I never felt any symptoms until I was 8weeks!..

And I had a miscarriage at 12weeks at the end of January this year could the same happen again