I've been on the implant nexplanon for 2 years now and I've suddenly started having periods, I've never bled on this implant or the last one at all, but 2 months ago I had thrush then I was spotting and my breasts were tender and my nipples were sore, I also had cramping, I've just got another period but no thrush. I'm just worried that my implant is not as effective now, can you help?