We've been trying for a year now, I'm hoping this month we accomplished

My boyfriend & I have been together 3 years. He's 24 almost 25 I'm 22, 23 in December. He has an 8 year old daughter (9 tomorrow). We have been trying for almost a year now with no luck. My LMP was July 30, my cycle is about 30 days long we've had sex every day the fracker said I was fertile in the process of ovulating. It says I'm 3 weeks 6 days if I did conceive but I haven't been feeling any syptoms like I am pregnant, only painful cramps in my lower stomach near my pelvic area & my boobs just started hurting/being sore yesterday. I have taken a test but it says negative. Any advice or comments? I'm scared we won't be able to have children together which will always be a little bothersome to me considering he has a daughter already