Baby fever

Hey guys so me and my boyfriend are 21 ben together for 7 years. We have a 5 year old and an almost 2 year old . We both have jobs , our own place , and financially stabled i would say . We want to try getting pregnant but idk if we should wait ? Would we look bad since were only 21 and going for a 3rd kid ? Or should we fo for it if we feel ready