Possibly pregnant or a late period? PLEASE HELP!!

I have been having very very light red some times pink spotting since 8/20/15 my first thoughts was my period was coming a day early(suppose to start 8/21/15) so I put a liner on cause I wasn't heavy enough to use a tampon, I went to the bathroom a few hrs later and nothing. On 8/21/15 I got up thinking my period had started but when I wiped there was just heavy clear discharge. Then a couple times that day when a went to the restroom it would either be the light spotting or the clear discharge. I haven't had any spotting since yesterday, nor have I fully started my period. I took HPT but it came out negative. Should I test again or just go to the doctor?