Clearblue pregnancy test .. possitive ?

ok so lately my periods have been all over since january ive been coming on my period every week or 2 and since may 15th may ive came on every 13 / 14 days for 2 days .. but since 11th june i aint come back on my period.. i have took 2 clearblue plus pregnancy tests and they showed negative but when i opend them up to take a closer look i culd see a very faint line but i had to be in good light to see this.. iam just wondering do you think if iam pregnant its to early to test? or is it negative ? iam not asking for you to give me a gauranteed anwser as i know you carnt do this im just asking for advice please !! ive been gettin belly like cramps and very bad migranes and last week for 2 days i felt sick.. advice please???