Advice needed; do I need to be worried!

Megan
Having been on my pill for about 5 years I decided it was time to take a break from it as I felt it was affecting my mental health my partner was very understanding and we agreed that while we wouldn't actively 'try' for a baby it wasn't necessary for me to be on the pill anymore. My 'withdrawal' period ended on the 6th March and I've been waiting for my first real one but no sign! I've taken a pregnancy test and it was negative so now I'm worried that there's something else wrong? My pill stopped my periods so was it just masking a problem or has it created one as I always had periods before I started taking it. Or am I just panicking over nothing?!