So I need advice. I got my mirena put in at 7 weeks post partum. Tried to get it put in at the…

So I need advice. I got my mirena put in at 7 weeks post partum. Tried to get it put in at the beginning of the week but my pregnancy test came back positive. They drew blood and had ms come back two days later and said I wasn't pregnant because my hormone levels were super low and it was probably left over from my pregnancy with my baby. So I have spotted almost constantly since getting it put in which is fairly normal (up to 6 months), been feeling fine and stuff, then this past week I've been randomly getting super nauseous, been sleeping a lot, and have these phantom baby movements. I shouldn't be nervous right? Like I am back to my pre pregnancy weight, been spotting, boobs don't hurt, ect