What does all this sound like?? I need advice.... Help!?

Okay, I am on birth control and have been for awhile. We use condoms and he pulls out every time. Last month I somehow missed taking a pill altogether so I took 2 at my usual time the next night. Last time I was on my sugar pills was May30th-June5th. It was a normal period as far as I can remember. I was out of town June1st-June 9th. I had 2 times the week of June 13th sometime(don’t remember). I will start taking my sugar pills this Sunday June 27th. On Saturday I started “spotting” or “breakthrough bleeding,” like when I wiped there would be pinkish blood, not dots but like in a liquid form. Today I am having it too so that would be 4 days. It doesn’t happen every time I go to the bathroom and I only see it when I wipe. It has never stained my panties except for Sunday night a lil bit so I put a tampon in(thought it would get heavier) but when I woke up on Monday and took it out all there was was like brown color(brown blood) not at all a lot. I have been getting more moody and my feel as if they are heavier. I get like this a week before my sugar pills so to me this is normal. The last couple days my head has been feeling very weird but I believe it is because I started taking Nasonex about a week and a half ago. Also, yesterday I had brown discharge that was on my panties. Also, since yesterday I feel as if I pee more often which I usually do around this time prior to starting my placebo pills. My fiancé thinks that all this spotting and stuff is due because I took a pill late last month. I have never experience spotting or breakthrough bleeding so I don’t know what to look for, because I have also heard of implamation bleeding which means I would be pregnant. I do not think I would be pregnant because of everything I am doing to prevent that from happening. Any advice or suggestions are greatly appreciated. Thanks!