What's going on ?!

I came off the contraceptive rod after having been on it for 5 years. I had it removed in July. I had a relatively regular period every month since then. We are TTC, but not overly actively, when it happens it will happen kinda thing. Anyway ! I was meant to be visited by Mother Nature October 14-15th. So far I'm 16 days late, My boobs have been REALLY sore constantly, I'm always tired but that's normal for me, I've been getting egg white consistency discharge that's very slightly yellow, no smell, no pain when urinating etc etc. I've put on 1/2 stone and I'm now 12 stone. 

I've took many early detection tests and so far absolutely nothing, I've also taken several ovulation tests which also are negative.

So yeah, I'm a bit confused as to what's happening ! Anyone had anything similar happen to them and can give me some advice on what might be going on. 

Tried to get an appt at doctors but it's so ridiculously hard, they are always full as soon as the lines open.

Thanks for any help in advance xx