after 2 miscarriages i have my BFP!!

I am honestly in shock and my heart is in my stomach i had a miscarriage at 9 weeks febuary and a blighted ovum August. we have just bought a house that needs so much work doing on it so we put off ttc for a while but wasn't taking and precautions because I am always quite certain when I ovulate well i wasnt sure this time as I must of ovulated earlier or later but I have my BFP! my anxiety is through the roof that I am going to loose this one too 😭😭 im trying my best not to worry my doctors wont perscribe me with any progesterone or anything until I have 3 miscarriages im just wondering if there is any i can buy as it carnt do any harm or if you ladies have any tips this will be our rainbow we have no children yet ❤