Am I going to Orgasm ?

When my bf gives me head he also uses his fingers and does like a come hither motion while sucking on my clit and everything. Sometimes I just feel like it’s too much and I feel a bit overwhelmed but I like it a lot and I feel like I’m going to squirt but I just keep thinking about how I feel his fingers rub against the roof of my insides and then it’s too much. Idk how can I calm myself and could I possibly cum and orgasm from this? because I feel like I am going to sort of or squirt but Idk and sometimes with the fingers it feel like a lot of pressure against my roof... but like in a good way. Oml idk has anyone experienced this feeling before and what can I do to be more apart of this experience and calm myself?