Early Pregnancy signs???

Chris • Mum to IVF April 2020 baby and now going through second round.

A few days ago I had mild cramping and lower backache. it only lasted for 2 - 3 days. But the lower backache is still here, very mild though. I have also had creamy mucus discharge the last 2 days. Then today I had very light pink spotting. I feel mild nausea every now and then. I don't know if I am pregnant or not. I am due for AF in 4 days time so I guess I can wait till then to do a test.