TTC at 35 and after IUD removal

Hey guys, I'm new here. A little about me... I'm 35.5, recently got married on 11•3•18, hubby's 33 and I have 2 girls (soon to be 15 in Feb & 9 in Jan). I was recently diagnosed with Lyme disease and not sure how all that will play into this journey. Anyways, my husband does not have any children of his own and we have decided to start trying. I just had my Mirena removed on 12•19 (after having one for the last 8 years with no cycles) and had some light bleeding on 12•21-12•23 and then some spotting on 12•24. Was that just some withdrawal bleeding? Or could I have actually had a cycle that soon? I'm just excited to start this new adventure and the waiting to know when I'll ovulate is driving me crazy! Any advice or words of wisdom are greatly appreciated!