Could I be pregnant? PLEASE HELP, LONG READ!

Danielle

On Dec 25th 2017, I started my period. I know, best Christmas present ever! NOT! Anyways so this past month, Jan, I was expecting to start my period, however it never came. My husband and I had sex on the 20th of Jan and I came and then he came later but pulled out. We don't use protection, I haven't been on birth control in like 8 years. We have sex like once a week. I am very regular so not starting my period is very very unusual. I don't think I've ever missed a period. We've been tryin to get pregnant for like 3 years but we were holding off right now because my husband is transitioning from the military life to civilian life. He was just hired on at a new civilian job and we are waiting for insurance to kick in now. I don't have any pregnancy symptoms. I've taken 2 tests, one on Saturday Jan 27th and one on Wed Jan 31st both came out negative. However I was spotting on like the 24th of Jan which I thought was unusual too. Also at the beginning of Jan, my boobs and nipples were extremely sensitive and hurt so bad but stopped shortly before my missed period. Now I just feel normal! I want to be pregnant so someone help pla me ease my mind. If I conceived on Jan 20th, when is the earliest I can take a pregnancy test? Is it possible to get pregnant a few days before your period is supposed to start? Why were my boobs so sore for the majority of January then stop right before my period was supposed to start? Somebody help share some insight if you've experienced this. Thanks yall!