I hope there's a baby in there

Royal
Okay so my cycle was kinda late . Nothing but 2 days late . I'm usually 29 days but it came a whole month from June 14 to July 14 . June cycle was a week early and I have no idea when I ovulated . July was shorter than usual 3 days instead of my full 7 days . I cramped more then usual before and now after and my nipple was so sore to the touch . I took a test 3 days before my cycle was due it was negative . I take prenatal everyday my husband and I are ttc I've gained some weight in my stomach hips and boobs and can barely sleep at night . I'm 18 and my husband is 22 . My cycle is over but I'm cramping bad and having lower back pains . I thought since my cycle came I wasn't pregnant but I've heard people to have there cycle and still be pregnant . We are ttc for baby #1 we're new at this and all these signs .