no period then?

hi all,so i am wondering if any one els had this before ... 3 days before AF i tested (03/02/2018) and got a very faint positive then tested again (04/02/2018) day of period and in 2 min got a line stil faint but can see it so i left it yesterday afternoon i had a bit of pain and had to go to the toilet because thought af was starting and it was a brown discharge that looked like jelly and the whole of yesterday had this brown discharge then i slept with a tampon in scard it was a start of AF so this morning took it out and it was stil dark brown discharge then i got a light pink when i wiped and now its stil brow on tampon and now it just stoped do have cramps but on and of and ita not bad and just want to throw up al the time ... can i stil be pregnant or is this something els ? must i test again next week saterday or what plz help .. never had this before in my live and never been late maby a day but nog 4 days and then this brown stuf al the time what can it be

thanxs xxx