Bfp before AF

So, I took a Walmart 88¢test Tuesday 9 (9/1/15) at 9:15pm and got a super faint positive. I'm not due for my period until 9/6/15. I took 2 more 88¢ that night and then again the morning of 9/2/15 and got two more bfps. Then yesterday afternoon I took a frer and got a positive and then took a first response gold digital and got a yes+. Took another test this morning which is the $1 test from dollar general and got a positive which was darker than the first day I took one (same tests). I guess my question here is should I be worried since I found out so early? Are my chances still good? I guess looking for some insight/advice/comfort.