Is this normal? Does it happen to you?

I've been TTC for year now and I've noticed my cycles have been a bit different. Before we started trying, I didnt have much in the way of PMS symptoms. Some bloating, tender breasts and increased sensitivity, (emotionally speaking) was about it. I never would have cramps until maybe my 2nd day of my period. Now, especially the last few months, I start having light cramping and sore breasts like a full 2 weeks before my period shows up. When this first happened I assumed implantation cramps, but after getting my period each month, I don't assume that anymore.

My hubby has commented that my PMS/Periods seem harsher, and asked if TTC could be to blame? And I didnt think it would be, but have any if you experienced this?

I'm pretty sure we had a chemical pregnancy back in March, and a week after my period came I had a migraine for 7 days, and now I just had another migraine yesterday and my period is "due" today. I don't really know what's going on. I went to the doc regarding the migraine and they ruled out anything serious, so I'm just assuming it's being brought on hormonally?