Emotional 😩

I think my fiancé of three yrs and I are splitting up and I'm due with our baby girl in just 2 months. I don't even know how to go about doing any of this on my own. We moved in together when I was just 19 so I've never been completely on my own and now with a baby. I'm terrified it doesn't help that I have no friends or family that are supportive. I'm so mad at myself for putting myself in this position. Any advice or words of encouragement. I'd love to hear success stories from other mamas that have been through similar situations.