Hi, I last had sex on Nov 10, 2013. Period (I think) came on Dec 16, 2013. Took 5 negative hpt & 1 negative quantitative blood tests at doctors office taken between Jan and Feb 5, 2014. No sex since Dec 2013. I've begun feeling "flutter-like taps" in my belly for about 3 weeks now and don't understand what's going on. I skipped a period in Jan 2014, bled for ONE day in Feb 5-6 and then bled TWO days just this week. I am normally have a period EVERY month up until my sex encounter with a friend back in Nov. 2013. I am 40 years old and weigh 245lbs. I'm considering going back to the doctor to ask about the
'flutters/ pops" on my belly (I have 3 children already ages 21, 17, 13) so I know what pregnancy feels like. I just don't want to come of as an idiot because all of my tests are saying negative. Even my quantitative read below one. I don't know if I have a pre- existing medical condition that could be causing the pregnancy results not to pick up. Any thoughts! I know this is a long shot.

Thanks