6 week appointment

I have my 6 week appointment tomorrow and I am having trouble deciding if I want to get on birth control or not. I have never been on birth control in my entire life but I am scared to get pregnant again so soon. I want more children but want to wait a couple of years. I have no idea which birth control would be good if I decide to get on it especially because im breastfeeding. I feel so conflicted and need to make a decision asap! Are there any you recommend or what are your thoughts on my situation?
Im also feeling so nervous to do the do again lol its been so long (6 weeks to be exact) im scared its going to hurt or that its still too soon. Not saying itll happen tomorrow but ill be cleared to again and im nervous for when it happens again. When did you feel comfortable to do the do again?