Pregnancy length?

I am now pregnant but I had no idea. I got my period a week after I had sex and now i missed this one. I’m concerned because I’ve been in a hot tub and I’ve consumed alcohol (at a wedding) I feel horrible! I had tried getting pregnant before but didn’t work. I had given up this Last month and thinking about it and well since I did get my period again, I didn’t take a pregnancy test. And I hadn’t had sex Since before my last period. Turns out I am and now I don’t know from where to count :/. Got a Drs appointment soon. I feel so guilty.