Husband isn't ready

My husband an I had our first son 6 months ago I am fully ready to be pregnant again but with him working full time and both of us being full time students he doesn't think we will have time or the money and now I find him avoiding sex 😔 however when we did have sex last week on Wednesday he didn't pull out soon enough and I could feel some cum in me 😂TMI I'm sorry now with some nauseousness I don't know what to think could I be nauseos already I am not supposed to start till the 19th and my ovulation date was the 5th driving myself nutty please someone