first time off bc

this is my first time off bc, so I have no idea if these symptoms are normal or if it's something more exciting!!
​day 16 of my cycle had some light brown and lots of clear ewcm. the ewcm stayed until day 18. since then I've had low backaches daily, headaches, my nipples are sore, and today I started feeling sore in my armpits and a little queasy with no appetite. just looking to see if anyone else has had this experience in their first month off of bc?