Think iv lost my baby

So Monday came I had been getting pregnancy symptoms before, I done a test and it came back positive I didn’t believe it so done 2 more both positive, it was before AF was due but had to know, so today which would have been AF DUE and I start heavily bleeding, to top it off my partner of 11 years who suffers with mental health left me last Saturday for no reason just up and left me and our son no explanation, now I’m alone and having a miscarriage and feel like the world hates me I dunno how much longer I can be strong for.....😭