1st ever BFP, not so positive

Jenny 🌈 • Rainbow 🌈 Baby Jan ‘19 ✨Baby Dust to All!✨
I had my first ever BFP last week at age 35. I was only a few weeks, not far enough to go to the doctor until the end of April.  Two days later (on my birthday) I woke up with cramps and heavy dark red bleeding, that's lasted a few days. I'm assuming I had a chemical pregnancy. Is there any way I'm still pregnant? How long should I wait to try again? I'm so scared and lost. I only have my fiancé to talk to about this, but he doesn't know anything either. Also, how can I let the <a href="https://play.google.com/store/apps/details?id=com.glow.android">Glow app</a> know I'm not pregnant anymore? I logged my bleeding and cramps, but it still says "expecting a tiny miracle!" 😔