What Do Tender Breasts, Light Periods With Cramps After Having Unprotected Sex Mean?

hi I had coil removed 4th of feb I started to bleed for three days very lightly after, im now experiencing constant sickness every day tender breasts and cramping on right side also going to toilet more often unsure when my period would be due but pregnancy tests are negative im 38 I have had unprotected sex but wondered could it be menopause?