conceiving post mirena...

3 months ago I had my mirena taken out after 4 years. My husband and I decided we wanted to try to have a baby. I have two  children's from previous relationships. 9 year old and 5 year old. Before those two I never was on birth control till after I had my youngest. We've been having sex few times a week, several times since I've been tracking while ovulating. This month I was two days late. Woke up went to the bathroom this morning and started bleeding. My excitement was crushed. Throughout the day I have taken a tampon out when I go to the bathroom, nothing on the tampon. Go to the bathroom wipe and little blood, look in the toilet and it's almost blood clots...should I just assume my body is trying to get back on a normal cycle since getting my mirena out...? I've looked it up on many blogs. Most women say the conceive right after they get their mirena out! Btw I'm only 29 I know I have lots of time, but I just don't want my kids so far apart. 😐