Last month I got the implanon inserted into my arm , I am now on my 3rd day of period and have a big bubble feeling in my uterus it's very uncomftable and I feel sick all the time . Before and after i eat. So I'm abit confused is it just part of having the implanon ? Or could I in some strange way be pregnant ? Even tho I have that contraception In my arm. Or is it just a air bubble from sex ? I'm not sure any advice would help :-) just don't want to feel sick and heavy anymore :-) thanks.