Still negative !

Chyvaurne • I`m a 22 year old mother of one beautiful girl 🌸 I am engaged and have the most amazing partner 💏💜
I don't know what's going on! I've been off the pill for months now, we use no protection. 
The last week I've been nauseous and tired and the last few days I've had sore boobs and a funny taste in my mouth! To avoid disappointment I didn't buy a HPT but today I just had to do it.. Negative :(
Why do I feel this way although I'm not pregnant!