So confused, help and opinions please!?

I had suspected appendicitis on Monday and was rushed to hospital I was given morphine and an xray and on three drips through the day and night. Today AF came strong - a week early! A friend said this could be a miscarry although I'd of only been 4/5 days past fertilisation. Did the medication cause a miscarriage? Or trigger an early period- but how? 
Can anyone help?! Been googling things but going in circles here. 

Glow Resources

Let’s Glow

Glow is here for you on your path to pregnancy

Glow helps you navigate your fertility journey with smart tools, personalized insights, and guidance from medical experts who understand what matters most.

25+ million

Users

4.8 stars

200k+ app ratings

20+

Medical advisors