mid-cycle bleeding while on Follistim...

Erica • I`m 37 and had our 🌈 Baby on 1/9/2020 after having a Chemical Pregnancy and an Ectopic Pregnancy resulting in the loss of our twins in July of ‘17.
Has anyone been on Follistim and had spotting? I'm CD 9 and had an ultrasound done of Tuesday and had 2 really good follies. I go back in the morning for another ultrasound. This evening I noticed some spotting and just now. I'm starting to panic just a little. Any help would be great. Thanks!