Had two miscarriages and pregnant again....

So! I am 19 years old, 225lbs and 5'4. I am overweight I know that..... I had a miscarriage in August at 10 weeks and a miscarriage in February at 5 weeks. I just found out two days ago that I am pregnant and 5-6 weeks along. I'm SO worried I'm going to have another miscarriage, and also wondering if my weight is a huge factor in my previous losses or what's going on..... August was my first time ever being pregnant in my life. I have a amazing job I make $600 a week have my own place with my SO of 6 years so please don't judge on my age! Has ANYBODY had 2 miscarriages and followed with a healthy pregnancy? Along with being plus sized? Thank you in advance!!!!