Pregnant and lost

So I’m new here, I’m 21 years old.. my name is Samantha and yesterday I found out I was pregnant. First time too and I’m terrified but excited... today has been a very rough day, my boyfriend who is also my child’s father. We have been dating for a little over a month and he already has 19 month old twin boys who I love dearly and hold them so close to my heart already. & I just went through a huge fight with my boyfriend and now I’m not sure if we are even together and if he is even happy about me being pregnant or even cares or if he is even gonna stick by my side... I hope he does.. but I’m lost and I don’t know what to do. And I just need some wisdom from anybody who has been in this situation or can give me any feedback.. I am a very overwhelmed, high anxiety, always over reacting and over thinking kinda person.. since I was little. I’ve had depression and high anxiety almost all my life and it makes me think negative 90% of the time and I’m afraid I ran my boyfriend off and I’m terrified that if I dont find a way to cope with my anxiety and negative thoughts and stress and depression that I’m gonna lose my baby from it and that is the last thing I want. Please help. All feedback is good just nothing negative please.. also calling my obgyn in the am to schedule my first appointment. Thank you!