Lots of women will always feel what they interpret as baby movement or quickening after being pregnant once. It's usually just gas or bowels moving.
Yes, its possible but very, very, unlikely.
Most women don't feel fetal movement until about 16-24 weeks gestation and a home pregnant test will detect pregnancy at this point if performed correctly. If the tests you took were taken recently then you are not pregnant. I agree with mstanfordm42's comment that gas can often be mistaken for quickening.
The irregularity of your periods could be due to a number of things. Perimenopause is a possibility too.
This is a pattern movement,gas does not come in a pattern and besides I have had 2 children, so this is not the first for me. I would just see what the dr finds out. I will keep you all posted. Thanks for the advice.