On the pill but no period?

My last period was the 6th of January, I didn't have one in February or March, but started the pill on March 13th. 
I'm now 3 days away from restarting the pill after a 7 day break, and the withdrawal bleed has not made an appearance. 
For the past week or two I have been spotting brown and light pink, but never once has it been red. 
I've been having a lot of pregnancy symptoms over the past few months too which have only gotten worse, I took a pregnancy test on Saturday morning and it was negative. 
What could be happening?
The waiting list to see my doctor is anywhere up to three weeks, so I'm stumped. 
What should I do?