Anyone else spot before their period?

Sa
Since hubs and I have started ttc I have spotted before my period, does anyone else have this happen? The first two months it happened i was convinced it was implantation bleeding and was devastated when it continued and turned into AF! I used to spot lightly for 12-24 hours before AF, but now it's around three days of medium spotting before it kicks in full force. Anyone know if this is normal? My mom is a nurse, I'd usually ask her, but this is not how I want her to find out she may be a grandma soon 😜 not necessarily concerned enought to call the doctor yet, either!