10 dpo!!

This morning I got my positive!!! Unfortunately I'm not as excited as I want to be. I had an early misscarriage back in March and it was devastating for me. Now I find out I'm pregnant only after 10 dpo and it just don't feel real. I feel like this one isn't gonna stay even though last time it took me to be 8 days late to even get a positive and now I get one before my period is even due and I still don't feel like it'll stay. I guess I'm afraid it won't this is our rainbow baby and we want him so bad!! I just want to be happy and excited but I'm afraid this one will get taken away from me too. I just need to know if I should be worried?? I just need support I guess.