You have a female Erythromma species, either a Red-eyed Damselfly (Erythromma najas) or a Small Red-eyed Damselfly (Erythromma viridulum)
Here are their distinguishing features.
Small Red-eyed Damselfly (Erythromma viridulum) female
Red-eyed Damselfly (Erythromma najas) female