Ladies, how do you identify a chemical pregnancy? Is there any symptoms?

i’m currently on the implant for birth control..my partner and i had been ttc for almost a year but i got a new job with great opportunities as well we started having problems in our relationship, we figured why not just wait to have our baby for a while.

i haven’t been on the implant for long... i’m currently on my third month with it and i have not yet received my period.. i had experienced some bleeding the first konth which my doctor said was normal. i also spoke to my doctor about being late which we had already spoken about before i got the implant.. we ruled out that i couldn’t be pregnant but i have been feeling a little weird, nauseous, bloated, some what of a stomach and my discharge also changed.. i let my doctor know as well and she assured me maybe i was getting my period soon.. i found it a little weird so i took a test a couple of days before new years <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a>, (12/27) to my surprise it came back positive!! i was so super excited. i have not yet spoken to my partner until im sure.. i tested today (1/4) and i got a negative? anyone have somewhat an idea what it could be?