Asthma & pregnancy

Does anyone have asthma?  Last time I was pregnant my asthma got really bad before I even knew I was pregnant. Sadly it ended in miscarriage at 9 weeks. It's been a year and 1/2 since then. AF due 3/14 (Tuesday) and my asthma is really bad. Worse than last time. Out of the blue it starting getting bad. I'm hopeful I'm pregnant again but to nervous to test and its early.  Anyone else have a similar situation???  Thanks in advance!