Can Someone Help Me Please????

Ok I have been over and over these ?'s and answers , but not really getting what I need ..... Ok hjere goes I keep close track of my periods and my cycles are 28-29 days and this month april 13th I was due I usually do not cramp before only the day I start and the next couple days here is my concern I didn't start untill april 15th I didn't bleed as hard and the 2nd day not heavy and nothing the 3rd day spoted in my sleep during a nap and nothing since I feel weird I have had 2 children before and had a bit of spotting when that 1st period due but not as heavy as this time but it was totally not a normal period and I still fell crampy
can any one help me o and I also use the femta program to track fertile times and I had sex on my most fertile day which was march30 and on a high fertile day april1 can someone offer me some knowledge or advice could I b pregnant my mom also spotted with my lil brother dr said he due march 17 he born feb 26....