Anybody, please help answer this question!!

Ok so here's my story... when I was pregnant of my two year old daughter I didn't find out I was pregnant until I was 2 months pregnant; because ok I conceived in July after my period, around the 15 then the next month I got my period like normal. I didn't get any symptoms of pregnancy until I was two months pregnant I was so naxious to the point I wasn't eating at all for 3 weeks I lost soooo much weight but because I thought at the time I got food poison; so my question is I was intimate with my husband a day before ovulation (9 of this month) 3 weeks ago I started getting weird cramps: my period was due the 24th (according to this app and my other app) but since I'm irregular I'm pretty sure My AF is due the 28 or 29; since my first pregnancy I got my period being pregnant WILL IT HAPPEN AGAIN (if I were to be pregnant ) ???? I already took 3 pre fancy test all in a different day and they all came negative ....