Hi Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern...
No, you should not be pregnant despite negative pregnancy test & intake of unwanted 72 pill. Most probably your periods are delayed. Delayed period is a common side effect due to high dose of
levonorgestrel in an
emergency contraceptive pill such as unwanted 72, which disrupts your normal menstrual cycles. So, Your periods might be delayed or 1-2 cycles.
Gastric bloating should be related to excessive stress related to getting pregnant or it can be a symptom of any gastro-intestinal problem.
Actually only one pill of unwanted 72 was enough to prevent pregnancy. You should not have taken 2 pills. Now pregnancy test is negative means you are not pregnant & your period is delayed.
Use condom or regular contraceptive pill as method of
contraception in future. Taking more emergency contraceptive pills such as unwanted 72 can cause problems like
irregular periods, ovarian hyper-stimulation syndrome & even
infertility.
Refer to a gynaecologist
Hope this information helps