Trying to concieve

I found out we were pregnant in December. Shortly after we had a miscarriage we were both devastated him more than me. Really want a baby to the point of obsession. I had my period 2/18 to the 22nd. I feel wierd. Nauseous fatigue boobs hurt when pushed on. I had dark brown mucus spotting Friday very light. But the past two nights the sex is different. I'm not sure how to put it other than its more intense more sensitive. Like I'm tighter almost. Any ideas.