Irregular periods and testing

Pip • Pregnant with a little boy • c-section is booked for 4th July 2016 at 8am ✨
I'm very irregular since coming off the implant. Is there anything people used to get more regular? Also my last period was the 1st April, my boobs are hurting and look a lot bigger and I'm feeling very tired. Should I test now, or wait a few weeks?