Whats going on?

Angie • I`m 32 with 4 kids. Married to my husband for 6 years but been together for 11. I just had a tubal reversal July 23rd 2015. Hoping to get have one more blessing brought into my life.
So af was supposed to show her face Monday. Well that has yet to happen. I have no signs of her coming, no cramping no nothing. So I am 2 days late. Yesterday I wiped and there was very faint pink, barely any at all. Today in wipe and it's brownish and once again, barely any at all. I have no signs of being pregnant or he than yesterday my books were a little sore. I had +opk on the 14th. BD 2 days prior. Then I had +opk again on the 22nd??? Luckily be BD on the 19th. I don't know what's going on because I have gotten nothing but bfn's. Should I wait a few more days and test again or just go to the docs. I am worried because having a tubal reversal I have an increased risk of ectopic and I don't want to take a chance at losing a tube at all! What should I do?