why am I so scared!!??!!

I had been off the depo 11 months before my periods came back. I had 3 cycles on exactly the right predicted dates and now this 4th cyxle I'm 5 days late today. I'm having some tummy cramps and extra trips to the toilet and increased tiredness and maybe tingly nipples and some pains in boobs. however I'm 5 days late....i haven't tested....im too scared to get a negative. I'm playing mind games with myself I know I am but for my first pregnancy it took 4 years to conceive and that was with ICSI fertility treatment so I'm sort of in the mind set I can't be pregnant because it has never happened before. But I'm 5 DAYS LATE I need to test. It's madness. I have actually gone out and got a test today so I'm edging forward. my Fiancé is being so patient bless him...he so wants to get excited but I've explained the troubles I had on my previous conception and so he is very understanding...but I'm sure he just wants to scream at me to do the test lol