I had intercourse with my boy friend in may I missed my periods when I checked urine pregnancy test after 10 days of my missed periods it showed negative,then after 1 week again I checked it again showed negative and finally again I checked after once week still it came negative,I was having my regular periods but this is the first time I dint not get periods for 2months...am I pregnant or is that someother cause??I'm really panic and nervous about it