Chemical Pregnancy? 😫

Nicola β€’ I`m a 32 year old teacher from the UK. Had my rainbow baby in September 2017 after miscarrying twice. Had a chemical pregnancy in January and now TTC #2
I am so confused... I think I've had a chemical pregnancy. This is horrible 😒 I've been having faint positives since last Friday and also been spotting which was completely different to AF
This morning my AF came.. 😭 Are there any other symptoms I'd be having?