TTC for baby #1

Hi everyone. My husband and I are currently TTC. We started trying back in August right after I went off b/c. I've been taking prenatal vitamins under the recommendation of my doctor. So far, no luck :( . I was a surrogate for an infertile couple several years ago & had no problems with getting pregnant with their embryo. Aside from getting married, nothing in my life has really changed. I'm still a full time student but I'm at an online school, so I'm far less stressed than if I was in a traditional 4 year university. My husband and I aren't sure how long it will take for me to get pregnant. I've had moderately sore breasts for the last few weeks, horrible nausea, etc. AF was several days late, so I did a home pregnancy test & it came back negative :( .