Could possibly be pregnant again 😩

I have a 9 month old daughter that I just love and adore and actually had problems conceiving (a year and a half) but now my period is late but I’m very confused. I’ve been having small cramps here or there for about a week now and keep telling myself “oh you’ll just start tomorrow” but never do. I did take one test like 3-4 days ago and it was 100% negative no line in sight. I still feel like I could be starting here soon because of these cramps. I’m so deathly afraid of being pregnant again. I want at least 3 years between my kids and I’ll be honest if I end up being pregnant I will be very upset. I’ve been on different birth control pills sporadically but end up switching because they make me so sick and currently not taking it. We try to be safe in other ways but clearly there is still a chance of pregnancy. I’m thinking of taking another test but so scared it might end up positive. Or I might be stressing over this way too much and that could be the reason for my period delay. It just terrifies me having 2 children so close together and something I don’t think I’d be ready for. I’m going to go back to the doctor soon and try to get the nexplanon implant (that is if I’m not pregnant again) mostly just ranting cause I really don’t have anyone to talk to about any of this. I can’t talk to my husband because he also does want another child this soon and he just doesn’t understand since he’s not a woman.