On the pill and missed a period-Could I be pregnant?

I have been on the pill for years and have never missed a period while on the pill.  This month I did miss a pill but took it immediately when I remembered.  When it was time for my period I had very very light brown spotting for a half a day.  My breast have been sore for two weeks and I was very crampy the whole week I should have had my period.  I have had 4 children already and my head is telling me I'm pregnant but I have taken 3 test and all were negative.  Does anyone have any answers?  Could I be pregnant?

[cheshchesh819]

how many hours late were you taking the pill,it could just be stress that is delaying your period,but the fact you have spotting is a bit weird,you know your body do an early morning sample

[sexystoner872]

hello i was just answering your post. i was on the pill for years never once missed my pills before. i didnt have a peroid one month i was freaked out abd everything i went to the doctor and come to find out i was pregnent. so u might be pregnant  go to the doctor and have him/ her check it out.

[lottie28]

Hi just wondering if anyone could help...i had the coil out 6th june and then went straight on to the pill i missed for 4 pills 2 t the beginning of the pack and 2 at the end, i had the 7 day break like your suppose to but no period just watery blood for 2 days and thats it, then i started to feel dizzy have the shakes, feel really sick and had headaches every day....so i didn't continue with the pill as i thought i must be pregnant i have done at least 10 hpt's all negative, it is now 8 wk's since having coil out and just over 3 wks since not taken the pill my boobs have grown in size dramaticly and i have piled on loads of wait, still feel sick and always sleepy can anyone help....going crazy here!!!  i have posted this on another forum about a wk ago but no reply! the sickness has gone but im more and more tired ach day ive taken more tests all negative dont know what to do shall i just start taking the pill again??