Oh my greatness!😱

So just last year if September I miscarried at 12 weeks. Well a few days ago I realized I was late. So I looked at my calendar and sure enough Valentine's I had too good of a night with my boyfriend. We always use protection but It failed us, I know I should be happy but I am not because I am afraid to know if I am pregnant. Every pregnancy has resulted in a miscarriage, I am afraid it will happen again. The pain is so bad it's worse than dying and I know what dying feels like because I almost died with my first miscarriage. How long should I wait to test? My hcg levels rise slower than normal so I dont know if I should wait a week or month.