irregular cycle


so my husband and I are trying for our second baby. I've always had 28 day cycles before getting pregnant. after my daughter my cycles went to about 30 days but have been at that length for about 10 months so I figured that was my new normal. for the last 2 months I've been spotting between cycles which never happened to me before and my last cycle was only 17 days. I'm concerned about this sudden change and my ability to get pregnant again. has anyone else dealt with this after pregnancy?