Needing some advice

I’m 26 years old. I have 2 kids and I’m on nexplanon. My husband and I want to have another kid, I don’t want to get off the nexplanon until October so I can lose some more weight. By then I will be on nexplanon for a year. I will be turning 27 on oct 31. Im afraid that I won’t be able to get pregnant because I want to wait. This thought keeps bugging me and idk why. I had a miscarriage before having my daughter, she is my second child. Before I had my first child I had a similar experience to my miscarriage. Back then I didn’t know what having one was like. So I keep thinking I’ve had 2 miscarriages and im afraid my body will just stop wanting kids. Should I have it taken out early to be safe!?!?!