WTF...

So, I know a lot of you will say "take a test" but I want to hear what you guys will think..
I removed my Nexplanon on 4 Feb and was on my period.
4 March, my husband came in me for the first time..
Since then I started to have really bad lower back pain, I lasted for a week. All I wanted to do was sleep. Waking up was a hassle! I wasn't even hungry and I would eat because I had to.
I've had this thirst too! All I want is water and as soon as my back stopped hurting, my boob did. I thought it was my sports bra but no.. It started getting worse.. Any suggestions?