Ttc missed period bfn

Two years ago my DH and I gave birth to our dd. Her birthday is next month and my dh and I have been Ttc since January this year. I have always had regular cycles. Jan and feb I got my periods and just thought, "well... Always next month". Well... March rolled around and AF never showed up. My heart skipped a beat and I thought for sure that it was our month! I took a million pregnancy tests which all came back bfn. I kept thinking my period would soon be on its way. April rolled around and I started experiencing all the symptoms. Low back ache, tender breasts and the like, but kept getting BFNs. At one point I sat down and thought I was forcing my body to have the symptoms because I waanted it so badly and my husband was putting alit of pressure on me every day by asking constantly, "are we pregnant yet?" So I stopped testing and stressing and let it be for a while. Then about a week before AF was scheduled to arrive, I started to spot. It was so light pink and only when I used the restroom. My heart fluttered at the sight. It lasted about 4 days and never increased in flow and then disappeared. I reluctantly took another test. Another bfn. It was then I scheduled an OBGYN visit. They couldn't see me for almost 3 weeks. I waited and hid my test stash from myself and swore to just let things be. Well may came around and I went to my first appointment. They scheduled an US for two weeks out and threw a cancer scare in my face. The doctor was like, "well you aren't pregnant...we aren't sure what's causing your period not to show...it could be your thyroid, could be a cyst...but do u have a history of cancer in your family?" I looked at him confused and thought about it, "yes, 3 aunts with breast and my grandfather died of testicular cancer." He just looked at his clipboard for a moment and then said, "well then we definitely want to do some blood work and schedule an US just to be on the safe side." My head started spinning...do I have cancer? I cried on the car ride home. A week and a half later I went in for my second appointment. They did an internal and external US. The doctor came in and did a pap. "Well mrs.faslun, your thyroid looks good, you don't have a hormonal imbalance, we didn't see any cysts on your ovaries, the lining on your uterine wall looks fine and we've ruled out cancer. Other than producing a little extra testosterone you're perfectly fine. To be frank, we aren't sure what's wrong with you." I stared at Him for a minute. Part of me wanted to panic, the other half wanted to jump for joy. "No clue at all?" I asked and he shook his head and said something about me maybe syncing to another females cycle and then asked if I had any new female friends. I told him yes and then He prescribed me some pills to take for 10 days and said it would force my period on the 11th day. I went home and have stared at the pills for a week now...I haven't taken Any more tests but the news hasn't stopped dh and I from trying...I'm at a loss for what I should do now, feeling hopeless and less of a woman. It wasn't hard to conceive my first... Why now all the problems? If anyone has any similar experiences, please share...I could use the comforting. And if anyone knows about the pills the doctor prescribed, are they worth taking? I don't like drugs and don't like putting chemicals into my body...any info would help. Ty. 3 month no show now.