21, pregnant, one night stand, model. i need your advice, or at least for you to listen?

Well I guess I should start back from four months ago. Well four months ago I decided I was going to move to London in hopes to really launch off my career. i choose London because i was born there while my parents were on vacation i was born two months early, I'm healthy now though, and i wouldn't have to worry about a visa or anything. fast forward to three days before i leave for London and me and my best friend since i was four, Brittney, decide to go out to celebrate one of my last days living in Miami beach. we go out to a really nice club and i meet this guy Asher, one thing leads to another and you know what happens. i normally don't do this i guess i was just wanting to live a little before i left. i remember us using protection, because i put it on him. but anyways i had ended my birth control 2 months before this because it made me gain weight and i was going to London to model where to girls eat a cracker a day, plus i don't sleep around so i figured why would i need it anyways. i was supposed to get my period 5 days later but i never did i just figured it was from being stressed from being in a new country. i start hating smells but i figure its again from being in a new place and smelling new things, then i start gaining weight, so i put myself on a diet of yogurt or diet shakes for breakfast a fruit or vegetable for a snack broth salad with no dressing or stu for lunch and dinner, which makes me loose about 12 pounds (with alot of exercise) which then i weigh even less that i did before i left, i also sleep alot but i fatigue its from not eating alot, then i don't get my period again, which i also attribute to being 5'7" and 110 pounds i also throw up a bit but i figure its from intense workouts. but i talk to Brittney and i'm telling her how everything smells bad and i gained weight because the food in London is 'fattening' and how i throw up sometimes when i work out and how I'm always tired and i didn't get my period and she says 'it sounds like your pregnant' and then i had to take a pregnancy test, just to prove to her i wasn't. it came out positive so i take 6 more, all positive. so i make a doctor appointment and they schedule an ultrasound and tell me I'm a little over 2 months along, i get a plane ticket for the next day back to Miami. which is where i am now, i just got back today i haven't told my mom yet because she is battling cancer (stage 3) and i don't want to stress her out even though she always supports me and i normally tell her everything, i just don't want this to effect her health my dad died when i was 17 and i have no aunts uncles or grandparents, i have a niece (Sadie shes 6) that the only other relative i have but she lives with her fathers brother because my dads sister and her husband both died. now to Asher my baby's father, i haven't told him i need your help, would it be better to meet in a public place or show up at his house? from what little i do know about him i know that he is 21 lives on his own in a nice house on the beach that his parents bought him. and he has a very very close family he even names his pets after his family (but changes the name a bit) he has 2 dogs and that's about it, but the family thing is good right? just please help me out! i need your advice! i know I'm keeping the baby, but how do i tell everyone?